In which example is the gravitational force of attraction between the two objects the greatest?
Answers
As a result, when two objects are close together and have enormous masses, their gravitational attraction is strongest.
WHOSE NEWTON LAW OF GRAVITION IS IT?According to Newton's law of universal gravitation, any two bodies in the universe are attracted to one another by a force that is inversely proportional to the square of the distance between them and a direct relationship between their mass products In other words, every particle of matter in the cosmos is attracted to every other particle by a force that is inversely proportional to the square of the distance between them and proportionate to their masses. Sir Issac Newton created the law in 1687.
According to their masses and separation, two objects will gravitationally pull one another.
The attractive force between two objects (F) is determined by Newton's law of universal gravitation and is equal to G times the product of their masses (m1m2) divided by the square of their distance
(r2), or F = Gm1m² / r2².
As a result, when two objects are close together and have enormous masses, their gravitational attraction is strongest.
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Related Questions
(1) What is the element with an electron configuration of 1s22s22p63s23p64s23d6?
(2) What is the element with an electron configuration of 1s22s22p63s23p6?
(3) What is the name of the element with a valence electron configuration of 4s1?
(4) What is the name of the element with a valence electron configuration of 2s22p5?
A. An element with the valence electron configuration 3s1 would form a monatomic ion with a charge of .
In order to form this ion, the element will (lose or gain) (1/2/3/4/5/6/7/8) electron(s) from/into the ( s/p/d/f/ s + p /s + d/ p + d) subshell(s).
B. An element with the valence electron configuration 3s23p3 would form a monatomic ion with a charge of .
In order to form this ion, the element will (lose or gain) (1/2/3/4/5/6/7/8) electron(s) from/into the( s/p/d/f/ s + p /s + d/ p + d) subshell(s).
Answers
(1) The element with an electron configuration of 1s22s22p63s23p64s23d6 is Iron (Fe).
The above electronic configuration is the repesentation of the electrons presents in different orbitals of the iron(Fe) .we have seen that all orbitals is completely filled before D orbital.
(2) The element with an electron configuration of 1s22s22p63s23p6 is Argon (Ar)
The above electronic configuration is the repesentation of the electrons presents in different orbitals of the Argon(Ar) .we have seen that all orbitals is completely filled.
(3) The name of the element with a valence electron configuration of 4s1 is Potassium (K)
The above electronic configuration is the repesentation of the electrons presents in different orbitals of thePotassium (K) .we have seen that all orbitals is completely filled before 4s1.
(4) The name of the element with a valence electron configuration of 2s22p5 is Flourine (F)
The above electronic configuration is the repesentation of the electrons presents in different orbitals of the Flourine (F) .we have seen that all orbitals is completely filled before 2p5.
A. An element with the valence electron configuration 3s1 would form a monatomic ion with a charge of +1. In order to form this ion, the element will lose one electron from the 3s subshell.
B. An element with the valence electron configuration 3s23p3 would form a triatomic ion with a charge of -3. In order to form this ion, the element will gain three electrons from the 3s and 3p subshells.
Elements achieve an inert gas configuration by gaining or losing electrons to attain a full valence shell of electrons, resulting in a stable electron configuration. This is also known as having a complete octet in their outermost energy level.
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Draw the structural formula of the aldehyde produced when the following is oxidzed. Interactive 3D display mode o Drew the molecule on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template foolbars.
Answers
The ability to form molecules and crystals is made possible by a chemical bond, which is a strong attraction between atoms or ions.
The bond may be created by the sharing of electrons in covalent bonds or by the electrostatic interaction between ions that have opposing charges. When two atoms share electrons, a covalent link is created. Depending on how many electrons it requires to attain octet, an element will make a certain number of bonds in a covalent molecule. The octet rule does not apply to hydrogen. The valence and bonding preferences of an atom's constituents can typically be used to predict a solid's qualities. Ionic, covalent, metallic, and molecular bonds are the four basic types of bonds covered here.Atoms form bonds with one another in order to stabilize the configuration of their negatively charged electrons. These electrons are arranged in what are known as "shells" surrounding the positively charged nucleus, and according to quantum theory, each shell becomes stable once it has a specific number of electrons.
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the nucleus of a lithium atom has a +3 charge
true or false?
Answers
Answer:
Size of a Nucleus
This nucleus has 3 protons (which gives the nucleus a charge of +3, identifying it as the element Lithium) and 4 neutrons (giving it a total mass number of 7).
Explanation:
Acid rain is a term that refers to a mixture of wet and dry deposited material from the atmosphere containing higher than normal amounts of nitric and sulfuric acids. Causes of acid rain include natural sources and man-made sources, mostly from the emissions of fossil fuel combustion, sulfur dioxide and nitrogen oxides. What is one natural source for these emissions contributing to acid rain
Answers
Answer: Volcanic Eruptions
Explanation:
Can someone walk me through this question??
The Percent yield for the reaction PCl3 +Cl2 --> PCl5 is 83.2%. What mass of PCl5 is expected from the reaction of 73.7% of PCl3 with excess chlorine?
Answers
The mass of \(PCl_5\) expected from the reaction of 73.7% of \(PCl_3\) with excess chlorine based on 83.2% percent yield would be 92.99 grams.
Percent yieldFrom the balanced equation of the reaction:
\(PCl_3 +Cl_2 -- > PCl_5\)
The ratio of the moles of \(PCl_3\) that reacts to that of \(PCl_5\) that is produced is 1:1.
73.7% of \(PCl_3\) = 73.7/137.33
= 0.5367 moles
Since the mole ratio is 1:1, the equivalent mole of \(PCl_5\) will also be 0.5367 moles.
Mass of 0.5367 moles \(PCl_5\) = 0.5367 x 208.24
= 111.7624 grams
But the reaction has only 83.2% yield:
111.7624 x 83.2% = 92.99 grams
Thus, the mass of \(PCl_5\) expected from the reaction will be 92.99 grams.
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2. Describe the changes in bonding and hybridization of the carbon atoms that take place during the polymerization of styrene to form polystyrene.
Answers
During the polymerization of styrene to form polystyrene, the bonding and hybridization of the carbon atoms undergo significant changes.
In styrene, the carbon atoms are originally sp2 hybridized and form a conjugated system of double bonds in the aromatic ring. However, during the polymerization process, the double bonds in styrene undergo addition polymerization.As a result, the carbon atoms in polystyrene undergo a transformation in hybridization from sp2 to sp3. The double bonds break, and new sigma bonds are formed between the carbon atoms, leading to the formation of a long chain of repeating units.
This change in hybridization allows the carbon atoms in polystyrene to form stronger and more stable sigma bonds with neighboring carbon atoms or other substituents. Consequently, the structure of polystyrene becomes a three-dimensional network of carbon-carbon bonds throughout the polymer chainThe transition from an aromatic, conjugated system in styrene to a saturated, three-dimensional polymer structure in polystyrene is vital in the polymerization process, providing the desired properties and structural integrity to the resulting polymer.
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A. What evidence have you discovered to explain why climate, natural resource availability, and the economic conditions of a region limit the production and uses of synthetic materials, such as the ones found in cell phones?
Answers
Answer:
Explanation:
There is evidence to suggest that the climate, natural resource availability, and economic conditions of a region can limit the production and use of synthetic materials such as those found in cell phones. Here are some examples:
Climate: The production of synthetic materials can be energy-intensive, and some regions may lack the necessary infrastructure or resources to generate the energy needed to produce these materials. In addition, extreme weather events such as hurricanes or floods can disrupt supply chains and damage manufacturing facilities, leading to production disruptions and delays.
Natural Resource Availability: Many of the raw materials used in the production of synthetic materials, including metals and minerals, are not evenly distributed around the world. Some regions may lack the necessary deposits of these resources to support large-scale production. In addition, extracting these resources can have negative environmental impacts such as water pollution, soil erosion, and habitat destruction.
Economic Conditions: The production of synthetic materials requires significant capital investment, as well as skilled labor and technical expertise. In regions where access to capital is limited or labor markets are underdeveloped, it may be difficult to attract the necessary investment and talent to support the development of a robust synthetic materials industry.
Moreover, there is a growing recognition that the production and use of synthetic materials can have significant environmental and social impacts, including pollution, waste generation, and worker exploitation. As a result, some regions may prioritize sustainable and equitable economic development over the pursuit of synthetic materials production.
Overall, these factors suggest that the production and use of synthetic materials are influenced by a range of economic, social, and environmental factors, which can vary widely across regions and countries.
How many 4d electrons would be predicted in the ground state for the following elements?a. zirconiumb. cadmiumc. iridiumd. iron
Answers
In order to answer the question first we must write the atomic number of each element:
Zirconium (Zr): 40
Cadmium (Cd): 48
Iridium (Ir): 77
Iron (Fe): 26
Then, we have to complete the distribution of electrons in each orbital for each atom:
The first 4 levels have the following distribution:
Level1: 1s
Number of electrones: 2
Level 2: 2s, 2p
Number of electrones 8 (2 in the s orbital and 6 in the p orbitals).
Level3: 3s, 3p, 3d
Number of electrones 18 (2 in the s orbital, 6 in the p orbital and 10 in the d orbitals)
Level 4: 4s, 4p, 4d, 4f
Number of electrones 32 (2 in the s orbital, 6 in the p orbitals, 10 in the d orbitals and 14 in the f orbitals)
The order in which the orbitlas are completed depends on the energy of each level. For example the 4s orbitals will be completed before the 3d orbitals because their energy is lower.
The order is as follows:
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p...
Now, knowing the atomic number we can answer the question:
For Zirconium (total 40 electrones):
\(1s^2,2s^2,2p^6,3s^2,3p^6,4s^2,3d^{10},4p^6,5s^2,4d^2\)2 electrones are predicted in the 4d orbital
For Cadmium (total 48 electrones):
\(1s^2,2s^2,2p^6,3s^2,3p^6,4s^2,3d^{10},4p^6,5s^2,4d^{10}^{}\)10 electrones are predicted in the 4d orbital
For iridium, as it has an atomic number higher than Cadmium we can predict tha it also complets the 4d orbital, then it has also 10 electrones in it.
For iron (total 26 electrones)
\(1s^2,2s^2,2p^6,3s^2,3p^64s^2,3d^6\)Iron has no electrones in the 4d orbitals
three students are asked to discuss why some molecules move further than others do on a chromatogram in the same amount of time. which student employs correct scientific reasoning?
Answers
Student 1 states that the molecules that are larger in size and are more attracted to the solvent will move further along the TLC plate employing the correct specific reasoning.
Why do some substances move further up the TLC plate than others?
Larger molecules take longer to move up the chromatography paper or TLC plate, whereas smaller molecules are more mobile. Likewise, the polarity of the molecules can affect how far the spots travel, depending on the type of solvent used.
What factor determines which molecules travel further in chromatography?
The stronger a compound is bound to the adsorbent, the slower it moves up the TLC plate. Non-polar compounds move up the plate most rapidly (higher Rf value), whereas polar substances travel up the TLC plate slowly or not at all (lower Rf value).
Thus, the molecules larger in size are more attracted to solvent will move further along the TLC plate is the reason why molecules move further than others in a chromatogram. So, student 1 is the correct option.
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What are both names for the compound HNO₂?
(In the spaces provided, write out the complete names of the compound requested)
The name of this compound when not dissolved is type your answer...
The name of this compound when dissolved in type your answer…
Answers
Answer:
Explanation:nitrous acid
Adding the reactants together is known as * (1 point) - Product - Compound - Precipitate - Reaction mixture Answer please. I really need it.
Answers
Answer:
Reaction Mixture
Explanation:
Using process of elimination;
Product
This is the substance formed as a result of a chemical reaction. Incorrect option
Compound
A substance formed when tow or more elements are chemically bonded together. Incorrect option.
Precipitate
Name given to an insoluble solid formed during a reaction. Incorrect option.
Reaction Mixture
Process of combing two or more substances to form a reaction. Correct option.
In a galvanic cell, _______________ occurs at the anode? (1 pt)
*
1 point
oxidation
reduction
Answers
In a galvanic cell, oxidation occurs at the anode?
The slogan "Red Cat An Ox" states that reduction happens at the cathode whereas oxidation happens at the anode. The anode would be the negative terminal for such galvanic cell because the anode's reaction serves as the origin of the electrons for such current.
No matter what kind of electrical cell is used, oxidation always occurs at the anode. Galvanic as well as electrolytic cells have reversible both cathode and anode charges.
Therefore, oxidation will happen at anode.
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5. How much water would need to be added to 750 mL of a 2.8 M HCl solution to
make a 1.0 M solution?
6. If I add 25 mL of water to 125 mL of a 0.15 M NaOH solution, what will the molarity of the diluted solution be?
7. If I add water to 100 mL of a 0.15 M NaOH solution until the final volume is 150 mL, what will the molarity of the diluted solution be?
8. How much 0.05 M HCl solution can be made by diluting 250 mL of 10 M HCl?
9. I have 345 mL of a 1.5 M NaCl solution. If I boil the water until the volume of the solution is 250 mL, what will the molarity of the solution be?
10.
How much water would I need to add to 500 mL of a 2.4 M KCl solution to make a 1.0 M solution
please help me
Answers
The values of molarity and volumes for the given questions are 2,100 mL, 0.75 M, 0.1 M, 50,000 mL, 2.07 M and 1,200 mL respectively.
What is the relation between the molarity & volume of solution?Relation between the molarity and volume of the solution will be shown by the following equation:
M₁V₁ = M₂V₂, where
M₁ & V₁ is the molarity and volume of one solution whereas M₂ & V₂ are the molarities and volume of the another solution.
Required volume of water needed to add at 750 mL of a 2.8 M HCl solution to make a 1.0 M solution will be calculated by using the above formula:V₂ = (750)(2.8) / (1) = 2,100 mL
Required molarity of diluted solution obtained on adding 25 mL of water to 125 mL of a 0.15 M NaOH solution will be calculated by using the above formula:M₂ = (0.15)(125) / (25) = 0.75 M
Required molarity of diluted solution obtained on adding 100 mL of a 0.15 M NaOH solution until the final volume is 150 mL will be calculated by using the above formula:M₂ = (100)(0.15) / (150) = 0.1 M
Required volume of HCl of 0.05M HCl can be made by diluting 250 mL of 10 M HCl will be calculated by using the above formula:V₂ = (10)(250) / (0.05) = 50,000 mL
Molarity of the resultant solution is:M₂ = (1.5)(345) / (250) = 2.07 M
Required volume of water to add on KCl solution is:V₂ = (2.4)(500) / (1) = 1,200 mL
Hence required values of molarity and volume are 2,100 mL, 0.75 M, 0.1 M, 50,000 mL, 2.07 M and 1,200 mL respectively.
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what common purification technique would be the most appropriate for the purification of vanillyl alcohol (mp
Answers
The most appropriate purification method for vanillyl alcohol would depend on the impurities present.However, a commonly used method for purifying organic compounds is recrystallization.
This involves dissolving the compound in a suitable solvent, heating to dissolve completely, and then cooling slowly to allow the compound to crystallize out. The resulting crystals are then filtered and washed to remove any remaining impurities.
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What is a total eclipse of the sun?
Answers
Answer:
This is called a solar eclipse
Explanation:
It's when the moon covers the sun
You could look up the 2016/2017 solar eclipse :)
Answer:
A solar eclipse happens when the moon gets in the way of the sun's light and casts its shadow on Earth. That means during the day, the moon moves over the sun i think it is cool
Explanation:hope it helps :)
consider the reaction below. h2po4– h2o h3o hpo42– which of the following is a base–conjugate acid pair? h2o and h3o h2o and h2po4– h2po4– and hpo42– h2po4– and h3o
Answers
The reaction given below can be represented as follows:`
H2PO4– + H2O ⇋ H3O+ + HPO42–
`Base–conjugate acid pair:` H2PO4–` and `HPO42–`
A Brønsted-Lowry acid-base reaction involves the transfer of a proton from one substance to another.
In this reaction, H2PO4– acts as an acid, donating a proton to water.
This produces the conjugate base of H2PO4–, HPO42–, and the conjugate acid of water, H3O+.
A base-conjugate acid pair is defined as two substances that differ only in the presence or absence of a single proton.
In this reaction, the base H2PO4– loses a proton to form its conjugate acid, HPO42–.
Therefore, `H2PO4–` and `HPO42–` is the base–conjugate acid pair.
The term "base-conjugate acid pair" refers to two species with the following characteristics:
They are both conjugates.
They differ by one hydrogen ion.
The dissociation of an acid (HA) results in the formation of a conjugate base (A−) and a hydrogen ion (H+). HA is called an acid, while A− is called a conjugate base.
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Why are a molecule's atoms as far away from each other as they can get?
A. Forces between electron pairs push the atoms apart.
B. Induced dipoles push the atoms away from each other.
C. Electronegativity differences force the atoms apart.
D. The protons in the nuclei push the atoms apart.
Answers
Answer: A
Explanation:
Because I just answered it and it’s right. ( Forces between electron pairs push the atoms apart.
How does decreasing the temperature of a solid affect the motion of the
particles in the solid?
Answers
Answer:
The particles in the solid move slower.
Explanation:
The decline in kinetic energy from decreasing the temperature results in slower moving particles.
How long would it take Jesse, with an acceleration of -2.50 m/s², to bring his bicycle, with an initial velocity of 13.5 m/s, to a complete stop?
Answers
Answer:
i am so sorry. i do not have a answer but i am trying to find questioms i can answer
Write balanced formula unit and net ionic equations for each of the following chemical reactions in solution. If no reaction occurs write NR include the states (s l g or aq) of all reactants and products. A. Copper(II) chloride + lead(II) nitrate B. Zine bromide + silver nitrate C. Iron (III) nitrate + ammonia solution D. Barium chloride + sulfuric acid
Answers
No reaction occurs in the above chemical equation, it is written as NR.
Here are the balanced formula unit and net ionic equations for each of the given chemical reactions:A.
Copper (II) chloride + Lead (II) nitrate
CuCl2(aq) + Pb(NO3)2(aq) → PbCl2(s) + Cu(NO3)2(aq)
Formula unit equation:
CuCl2(aq) + Pb(NO3)2(aq) → PbCl2(s) + Cu(NO3)2(aq)
Net Ionic Equation: Cu2+(aq) + Pb2+(aq) → PbCl2(s) + Cu2+(aq)B. Zinc bromide + Silver nitrate
ZnBr2(aq) + 2AgNO3(aq) → 2AgBr(s) + Zn(NO3)2(aq)
Formula unit equation:
ZnBr2(aq) + 2AgNO3(aq) → 2AgBr(s) + Zn(NO3)2(aq)
Net Ionic Equation: Zn2+(aq) + 2Br-(aq) + 2Ag+(aq) + 2NO3-(aq) → 2AgBr(s) + Zn2+(aq) + 2NO3-(aq)C. Iron (III) nitrate + Ammonia solution
Fe(NO3)3(aq) + 3NH3(aq) → Fe(OH)3(s) + 3NH4NO3(aq)
Formula unit equation: Fe(NO3)3(aq) + 3NH3(aq) → Fe(OH)3(s) + 3NH4NO3(aq)
Net Ionic Equation:
Fe3+(aq) + 3NH3(aq) + 3H2O(l) → Fe(OH)3(s) + 3NH4+(aq)D.
Barium chloride + Sulfuric acid
BaCl2(aq) + H2SO4(aq) → 2HCl(aq) + BaSO4(s)
Formula unit equation:
BaCl2(aq) + H2SO4(aq) → 2HCl(aq) + BaSO4(s)
Net Ionic Equation:
Ba2+(aq) + SO42-(aq) → BaSO4(s)
As no reaction occurs in the above chemical equation, it is written as NR.
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how does eating locally grown food in season save energy?
Answers
Eating locally grown food in season saves energy by reducing transportation distances, minimizing the need for preservation and refrigeration, and decreasing reliance on energy-intensive greenhouse production.
Eating locally grown food in season can have significant energy-saving benefits. One of the main ways it saves energy is by reducing the need for long-distance transportation. When food is grown locally, it doesn't have to travel thousands of miles to reach your plate. This means less fuel is consumed and fewer greenhouse gas emissions are produced during transportation.
Another energy-saving aspect of eating locally grown food in season is the reduced need for preservation and refrigeration. Locally grown food is often harvested at its peak freshness, which means it can be consumed immediately or stored for shorter periods. This reduces the energy required for preserving and refrigerating food.
Furthermore, seasonal foods are more likely to be grown outdoors, which reduces the need for energy-intensive greenhouse production. Greenhouses require heating, lighting, and other energy inputs to create a suitable environment for growing crops. By consuming seasonal foods, we can reduce the demand for greenhouse-grown produce and the associated energy consumption.
In conclusion, eating locally grown food in season saves energy by minimizing transportation distances, reducing the need for preservation and refrigeration, and decreasing reliance on energy-intensive greenhouse production. By making conscious choices about the food we consume, we can contribute to a more sustainable and energy-efficient food system.
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Eating locally grown food in season can save energy through several mechanisms like reduced transportation, less refrigeration, and lower greenhouse gas.
Reduced transportation: When you eat locally grown food, it needs to travel far less between the farm and your plate.
Food that is not grown nearby frequently needs to be carried across great distances, perhaps even across whole continents.
Less refrigeration: Minimal refrigeration is required since locally grown seasonal foods may frequently be immediately transported to local markets after being swiftly harvested at their ripest.
Food with a shorter shelf life and a higher level of freshness often need less refrigeration during storage and transit.
Lower greenhouse gas emissions: Long-distance food delivery adds to glasshouse gas emissions, which are mostly caused by the combustion of fossil fuels in moving vehicles.
By consuming food that has been grown nearby, you may lessen your contribution to climate change and the carbon footprint of your trip.
Energy-efficient agricultural techniques: Local farmers frequently use more environmentally friendly and energy-efficient techniques.
Compared to large-scale industrial agriculture, they may employ methods like crop rotation, organic fertilizers, and integrated pest control, which can lower the amount of energy needed for farming.
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When pyruvate is broken down, the acetyl group is attached to coenzyme a, and two high-energy electrons are transferred to.
Answers
When pyruvate is broken down, the acetyl group is attached to coenzyme a, and two high-energy electrons are transferred to NAD+ to produce NADH.
Pyruvate is a three-carbon compound gotten from the glycolysis of glucose during cellular respiration. It is the end product of glycolysis and one glucose molecule gives two pyruvate molecules. After glycolysis in the cytosol of the cell, pyruvate is sent to the matrix of the mitochondria to begin the second stage of cellular respiration - pyruvate oxidation. The steps in pyruvate oxidation are:
Step 1: A carboxyl group is removed from the pyruvate and oxidized to give carbon dioxide, the by-product of respiration. Since one molecule of glucose gives 2 molecules of pyruvate, one glucose molecule will also give 2 molecules of carbon dioxide.Step 2: The remaining two carbon molecule from the pyruvate is oxidized into acetyl and high energy electrons. An enzyme called Coenzyme A (CoA) combines with the acetyl to give acetylCoA, which is used as the main fuel in the next stage of cellular respiration, the Kreb's cycle.Step 3: The high energy electrons combine with NAD+ and reduce it to NADH. NADH is an energy molecule used to synthesize ATP.Hence, when pyruvate is broken down, the two high energy electrons gotten from the formation of acetyl are transferred to NAD+. It gets reduced by the electrons and forms NADH.
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Using your knowledge of activation energy, why doesn't the dollar bill start on fire?
Answers
Answer:
because it's soaked in a mix of alcohol and water
Explanation:
the bill absorbs the water and the alcohol burns off
The active ingredient in a Tum® antacid tablet i calcium carbonate (CaCO 3, FM = 100. 09), it neutralize exce hydrochloric acid (HCl, FM = 36. 46) in the tomach via the reaction CaCO 3 () 2HCl(aq) → CaCl 2 (aq) H 2 O(l) CO 2 (g). A certain doe of Tum containing 750 mg of CaCO 3 i added to 25 mL of 0. 100 M HCl. What i the volume of CO 2 generated under condition of STP?
Answers
The volume of CO₂ generated under condition of STP in the reaction :
CaCO₃ + 2HCl -----> CaCl₂ + H₂O + CO₂ is 12.5 mL.
The reaction is given as :
CaCO₃ + 2HCl -----> CaCl₂ + H₂O + CO₂
mass of CaCO₃ = 750 mg = 0.75 g
molarity of HCl = 0.100 M
volume of HCl = 25 mL = 0.025 L
moles of CaCO₃ = 0.75 / 100
= 0.0075 mol
moles of HCl = 0.100 × 0.025
= 0.0025 mol
here HCl is limiting reagent , formation of CO₂ depends on HCl
2 moles of HCl = 1 mole of CO₂
0.0025 mol of HCl = 0.0025 / 2
= 0.00125 mol
volume of CO₂ = moles / molarity
= 0.00125 / 0.100
= 0.0125 L = 12.5 mL
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Atoms of an element, X, have the electronic configuration shown below.
The compound most likely formed with magnesium, Mg, is:
(A) MgX
(B) Mg2X
(C) MgX2
(D) Mg3X2
Answers
The compound most likely formed with magnesium, Mg, is MgX . The correct option is (A) MgX.
The electronic configuration of the element, X is 2,8,7. Since X is located in group 7 of the periodic table, it has 7 electrons in its valence shell. In order to obtain a stable configuration, the atom can either gain one electron to fill the 3rd energy level completely or lose seven electrons to completely empty the 2nd energy level, which is easier. The resulting ion, X-, would have a stable electronic configuration of 2,8. Hence, the compound most likely formed with magnesium, Mg, is MgX .The correct option is (A) MgX.
Explanation: Magnesium is located in group 2 of the periodic table and has two valence electrons in its outermost shell. It loses these two electrons to form Mg2+ ions with stable electronic configurations of 2,8. On the other hand, element X gains an electron to form X- ions with stable electronic configurations of 2,8.The combination of Mg2+ and X- ions results in the formation of the compound MgX with a neutral charge.
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7. convert 22.7g to μg
Answers
The 22.7 g in μg ( micro gram ) is 22.7 × \(10^{-6}\) .
We need to convert between units in order to ensure accuracy and prevent measurement misinterpretation.
For example , we do not measure a pencil's length in kilometers . In this situation , one must convert from kilometers ( km ) to centimeters ( cm ) . In most cases, multiplicative conversion factors are used to convert one unit to another of the same quantity .
Sometimes the units of measurement used may not correspond to the standards required for a particular process or application, as well as the measuring choice and convenience. The mass of object in micro gram unit is less than gram .
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Need help with these chemistry quesions about mole ratios. There's an image linked to this. Please help
Answers
1) moles Al : moles of HCl
2 : 6
simplifying the ratio;
1 : 3
2) \(HCl : AlCl_{3}\)
6 : 2
3 : 1
3) \(Al : AlCl_{3}\)
2 : 2
1 : 1
4) \(HCl : H_{2}\)
6 : 3
2 : 1
5) \(HCl : H_{2}\)
2 : 1
6 : x
x = 6/2
x = 3 moles
6) \(HCl : H_{2}\)
2 : 1
12 : x
x = 12/2
x = 6 moles
7) \(HCl : H_{2}\)
2 : 1
3 : x
x = 3/2 moles
Gamma rays are very penetrating because of their
high energy and positive charge
high energy and zero charge
high energy and negative charge
low energy and zero charge
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Answer:
high energy and negative charge
When investigating whether or not the substance dibromoethane (ethylene dibro- mide) is carcinogenic, we follow the survival history of 161 white employees of 2 factories who were exposed to dibromoethane. Among them, we observe 7 can- cer deaths in the period 1940-1975. On the other hand, the mean number of cases over that period in that general population is expected to be 5.8. Do those 7 cases provide a reason to consider the substance as carcinogenic?
Answers
When investigating whether or not the substance dibromoethane (ethylene dibromide) is carcinogenic, we follow the survival history of 161 white employees of 2 factories who were exposed to dibromoethane.
Among them, we observe 7 cancer deaths in the period 1940-1975. On the other hand, the mean number of cases over that period in that general population is expected to be 5.8. Do those 7 cases provide a reason to consider the substance as .Yes, the seven cases provide a reason to consider the substance dibromoethane as carcinogenic.
Since the number of cancer deaths observed in the 161 white employees exposed to dibromoethane is 7 which is greater than the expected cancer deaths in the general population, which is 5.8. Therefore, the excess cases may suggest that dibromoethane has some carcinogenic potential.
Hence, we can consider dibromoethane as carcinogenic.
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the term used to denote concentration of electrolytes in a given volume is
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The term used to denote the concentration of electrolytes in a given volume is "molarity".
Molarity-
Molarity is the number of moles of solute dissolved in one liter of the solution. Molarity is the most widely used concentration metric in chemistry, and it is frequently denoted by "M." It denotes the amount of solute in moles per liter of solution.
A solution's molarity can be calculated using the following formula:
Molarity = moles of solute / liters of solution
Molarity is often used to express the concentration of a solution's electrolytes because electrolytes break into ions when dissolved in a solvent, allowing for electrical conductivity.
Molarity can be used in other applications, such as stoichiometry, which involves determining how much of one compound is required to react completely with another.
Molarity is a useful tool for solving problems that involve chemical reactions since the number of moles of a substance is frequently used to establish reaction ratios, limit reactants, and determine the theoretical yield.
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