Answers
Parenthesis
Exponent
Multiplication
Division
Addition
Subtraction
Methon
Related Questions
C. Use the data provided in Table 2 to complete the following.
Sketch a phase diagram for O₂. The diagram should be roughly to
scale and include the Triple point and Critical point.
Answers
The triple point can be seen from the graph that has been attached here.
What is the triple point?The triple point is a special combination of temperature and pressure where the equilibrium of a substance's three phases—solid, liquid, and gas—occurs. The transition between phases happens with no discernible net change in the substance because the solid, liquid, and gas phases are in perfect equilibrium at the triple point.
A crucial reference point in thermodynamics, the triple point is frequently used to specify temperature scales and calibrate thermometers. Each substance has a specified value for temperature and pressure.
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The chemical formula for hydrogen sulfide is H₂S. What is the mass of hydrogen in 150 g of
H₂S? (H = 1, S = 32)
Answers
The chemical formula for hydrogen sulfide is H₂S. The mass of hydrogen in 150 g of 141.2 g. Therefore, option A is correct.
What is mass ?A body's mass is an inherent quality. Prior to the discovery of the atom and particle physics, it was widely considered to be tied to the amount of matter in a physical body.
Simply put, mass is a measurement of a body's amount of matter. Matter is everything that has both volume and mass. Although mass cannot be seen, it can be measured or quantified. Not all matter is visible. Typically, mass is expressed in kilograms, etc.
Molar mass of H₂S
= 1 × 2 + 32
= 34
The mass of hydrogen in 150 g is 141.2 g.
Thus, option A is correct.
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What is the Law of Conservation of mass?
Answers
Answer: Mass is neither created nor destroyed
Explanation: Mass or matter cannot be created or destroyed even by chemical or physical changes/transformations
Which of the following sequences of elements would all have four valence electrons?
A.) B, Si, As, Te
B.) C, Si, Ge, Sn
C.) O, S, Se, Te
D.) Ga, Ge, As, Se
Answers
Answer:b
Explanation:
Valency measures the number of electrons in the outer shell of an atom that can participate in a chemical reaction. In the group of answers provided, the elements that will have four valence electrons in their outer shells are group:
B.) C, Si, Ge, SnElements in group fourteen have four elements in their outer shells.
Elements can enter into chemical bonds with other elements due to the sharing or donation of atoms in the valence shell.
Thus, a covalent or ionic bond can be formed through these relationships.
Therefore, the elements in group fourteen namely, carbon, Silicon, Germanium, and Tin (Stannum) all contain valence electrons.
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2. How do we find the number of neutrons in an atom?
(10 Points)
a. Add the protons and electrons
b. Subtract the protons from the electrons
c. Subtract the atomic number from the atomic mass
d. Subtract the atomic mass for the atomic number
Answers
Answer:
For all atoms with no charge, the number of electrons is equal to the number of protons. The mass number, 40, is the sum of the protons and the neutrons. To find the number of neutrons, subtract the number of protons from the mass number.
Explanation:
Answer:
Letter C. Subtract the atomic number from the atomic mass
Barrett and Drew argue about undiscovered elements. Barrett says he can’t wait until we discover element 120 in our environment. Drew argues that we will probably never discover element 120 in our environment. Based on concepts you learned in this lesson, settle their argument. Identify who is probably correct and describe why?
Answers
Based on concepts you learned in the lesson, Barrett who says he can’t wait until we discover element 120 in our environment is correct because we discover new elements everyday.
What is an Element?This is referred to as a chemical substance that cannot be broken down into other substances and examples include sodium , hydrogen etc.
We can infer from this argument that Barrett is correct because new elements are being discovered by scientists from time to time so it is false to say they won't be discovered anymore,.
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A compound having an approximate molar mass of 165 - 170 g has the following...
A compound having an approximate molar mass of 165 - 170 g has the following percentage composition by mass: carbon, 42.87%; hydrogen, 3.598%; oxygen,
28.55%; nitrogen, 25.00%. Determine the empirical and molecular formulas of
the compound.
Answers
Answer:
Find ratio of atoms for empirical formula, divide mass by atomic mass
C=42.87/12 = 3.57
H= 3.598/1 = 3.598
O= 28.55/16 = 1.784
N= 25.00/14 =1.1785
to see ratio, divide by smallest no
Gives C2H2ON for empirical formula
Empirical mass = 24 +2 +16 + 14 = 56
165 to 170 /56 = 3
so molecular formula = empirical formula x 3= C6H6O3N3
1. The empirical formula of the compound is C₂H₂ON
2. The molecular formula of the compound is C₆H₆O₃N₃
1. Determination of the empirical formula.From the question given above, the following data were obtained:
Carbon (C) = 42.87%
Hydrogen (H) = 3.598%
Oxygen (O) = 28.55%
Nitrogen (N) = 25.00%
Empirical formula =?C = 42.87%
H = 3.598%
O = 28.55%
N = 25.00%
Divide by their molar mass
C = 42.87 / 12 = 3.5725
H = 3.598 / 1 = 3.598
O = 28.55 / 16 = 1.7844
N = 25.00 / 14 = 1.7857
Divide by the smallest
C = 3.5725 / 1.7844 = 2
H = 3.598 / 1.7844 = 2
O = 1.7844 / 1.7844 = 1
N = 1.7857 / 1.7844 = 1
Therefore, the empirical formula of the compound is C₂H₂ON
2. Determination of the molecular formula.Molar mass of compound = (165 + 170)/2
Molar mass of compound = 335/2
Molar mass of compound = 167.5 g/mol
Empirical formula = C₂H₂ON
Molecular formula =?Molecular formula = Empirical formula × n = molar mass of compound
[C₂H₂ON]n = 167.5
[(12×2) + (2×1) + 16 + 14]n = 167.5
[24 + 2 + 16 + 14]n = 167.5
56n = 167.5
Divide both side by 56
n = 167.5 / 56
n = 3
Molecular formula = [C₂H₂ON]n
Molecular formula = [C₂H₂ON]₃
Molecular formula = C₆H₆O₃N₃Therefore, the Molecular formula of the compound is C₆H₆O₃N₃
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What do these two changes have in common?
water evaporating from a lake
sediment settling to the bottom of a muddy puddle
Select all that apply.
Both are only physical changes.
Both are chemical changes.
Both are caused by heating.
Both are caused by cooling.
Answers
Answer:
Both are caused by heating. Both are Chemical changes.
Explanation:
Water evaporates from the Sun's heat and is transformed into a gas.
Sediment is the particles of an object. When heat hits it, it starts breaking up, or in dry cases, heating and cracking.
The study of chemicals is called chemistry.
The correct answer is B.
There are two types of changes in the chemical reaction. These changes are as follows:-
Physical changeChemical change.The change which is reversible is called a physical change. For example - evaporating of water.
The change which is irreversible and can not get back to is original form is called chemical change. For example - the digestion process in a human.
According to the change, the correct answer is A that is a physical change because both can change back to their original form.
Hence, the correct answer is A.
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Bonnie wants to see if playing music to plants will help them grow taller. She buys 4 of the same kind of plant. They all receive the same amount of sun and water. She plays rap music to plant A, country music to plant B, rock music to plant C, and plant D gets no music at all. Everyday for a week she measures the height of each plant.
Answers
DO NOT HESITATE TP ASK FOR FURTHER EXPLANATION.
HOPE THAT HELPED.Which best explains what happens to energy when we see a spark on the van der graaf generator?
a. chemical energy is being stored
b. electrical potential energy is being converted into kinetic energy
c. electrical kinetic energy is being stored
d. chemical energy is being released
Answers
When we see a spark on the Van de Graaff generator, the best explanation is that electrical potential energy is being converted into kinetic energy. The Van de Graaff generator uses a belt and metal comb to transfer electrical charges. It creates a high voltage difference between the metal dome and the ground.
This buildup of electrical potential energy is released when a spark occurs. The spark is the result of the electrical charges overcoming the resistance between the dome and the ground. As the charges move from the dome to the ground, they gain kinetic energy and create a visible spark.
So, in this case, electrical potential energy is being converted into kinetic energy. This process happens due to the buildup and release of electrical charges.
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NaCl + NH3 + CO2 + H20 NaHCO3 + NH4CI
Which Lewis electron-dot diagram correctly represents the reactant containing nitrogen in the equation?
Answers
That leaves us with drawing the structure of NH4Cl.
This was a tough one for me to find, as I kept drawing Ammonia instead and couldnt figure out how to fit in the extra Hydrogen and Chlorine. Luckily, this Y!A answer explains it, its due to a hydrogen bond
Option (1) represents the Lewis electron-dot diagram correctly containing nitrogen in the equation.
Lewis Structure is a very simplified representation of the valence shell electrons in a molecule. It is used to show how the electrons are arranged around individual atoms in a molecule. Electrons are shown as "dots" or for bonding electrons as a line between the two atoms.
Valence electrons are given by hydrogen atoms = \(1\times3=3\)
Valence electrons are given by nitrogen atom = \(5\times1=5\)
Total valence electrons = 3 + 5 = 8
So, the calculation above is shown only the first option. So, (1) Lewis electron-dot diagram correctly represents the reactant containing nitrogen in the equation.
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Explain each of these impacts and suggest a solution that would reduce the losses caused by bycatch.
Answers
Answer:
Bycatch can negatively affect species such as dolphins, sea turtles, protected fish, and whales by harming animals, contributing to population declines, and impeding population recovery. Other impacts of fisheries on marine mammals may include removal of their preferred prey and sometimes habitat damage.
Explanation: hey could i get to kno u or sum
Which of the following is correct?
А.
When the lungs contract, they fill with air from the atmosphere.
В.
When the heart contracts, it fills with air from the atmosphere.
C
When the lungs expand, they fill with air from the atmosphere,
D
When the heart expands, it fills with air from the atmospherer
Answers
Answer:
C when lungs expand they fill with air from the atmosphere
Suppose a solid object is fully immersed in a liquid, but B is larger than w. Is this possible at all
Answers
This problem is stating a situation in which a solid object is fully immersed in a liquid and the buoyant force is larger that its weight, so that you need to discuss whether this is possible or not.
In general terms, it is necessary to keep in mind that when the buoyant force is larger than its weight, the object will float. On the other side, when the buoyant force is smaller than the weight, then the object will sink.
It means that it could be possible to have this scenario under specific conditions. Now, the Archimedes' principle can be applied with the following version:
\(F_B+W>m_{obj}*a\\\\\rho _{fluid}*V*g+m_{obj}*g>m_{obj}*a\\\\\rho _{fluid}*V-m_{obj}>m_{obj}*a\)
It means that the object can move down the liquid if has a significant acceleration (could be external), even when the buoyant force is larger than the weight
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Erica is working in the lab. She wants to remove the fine dust particles suspended in a sample of oil. Which method is most likely to yes? A reverse osmosis b osmosis c filtration d dilution
Answers
Answer: reverse osmosis.
Explanation:
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Which particle matters the most when it comes to stable atom protons or neutrons?
Answers
Answer:
Protons
Explanation:
Protons are worth 1, while neutrons are neutral and are worth zero.
the structure of butanoic acid
Answers
answer on here fjchcjfjdnc.com
The concentrations of magnesium and carbonate ions in a saturated aqueous solution of MgCO, are both 0.00632 M. Calculate the solubility product, Kap, for MgCO3. Кр 3.9 x10-5
Answers
To find the solubility product, Kap, for MgCO3, we need to use the equation:
MgCO3(s) ⇌ Mg2+(aq) + CO32-(aq)
The equilibrium expression for this equation is:
Kap = [Mg2+][CO32-]
We know that the concentrations of Mg2+ and CO32- in a saturated solution of MgCO3 are both 0.00632 M. Therefore, we can substitute these values into the equilibrium expression:
Kap = (0.00632 M)(0.00632 M) = 3.998 x 10^-5
Rounding this value to two significant figures gives:
Kap = 3.9 x 10^-5
Therefore, the solubility product for MgCO3 is 3.9 x 10^-5.
To calculate the solubility product (Ksp) for MgCO3, you'll need to consider the dissociation equation:
MgCO3 (s) ⇌ Mg²⁺ (aq) + CO₃²⁻ (aq)
The concentrations of magnesium (Mg²⁺) and carbonate (CO₃²⁻) ions in the saturated solution are both 0.00632 M. Since the stoichiometry is 1:1, the Ksp expression can be written as:
Ksp = [Mg²⁺][CO₃²⁻]
Now, substitute the given concentrations: Ksp = (0.00632)(0.00632)
Ksp = 3.99 x 10⁻
So, the solubility product, Ksp, for MgCO3 is approximately 3.99 x 10⁻⁵.
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A sample of carbon dioxide gas occupies a volume of 2.50 l at 140 kpa. what pressure would the gas exert if the volume was decreased to 1.25 l?
Answers
Answer:
280 kPa
Explanation:
P1V1 = P2V2
140 * 2.5 = P2 * 1.25
P2 = 280 kPa
Monica has $20. She needs to buy a gallon of milk that costs $2.50. She also wants to buy yogurt, which costs $1.20 a cup. What is the greatest number of cups of yogurt Monica can buy? Use the inequality 1.20x + 2.5 ≤ 20 to solve the problem
Answers
1.20x <20-2.5
1.20 x<17.5
Divide both sides by 1.20
X< 14.58
At the most she can buy 14 cups
The bond_____
covalent bond.
is the actual number of bonded pairs of electrons in a
Answers
A covalent bond is the exact number of bonded pairs of electrons in a compound
One electron is added by each atom to a pair of shared electrons in a single bond. While double bonds share only one pair of electrons, triple bonds share three pairs. Bonds with multiple covalent bonds exchange several electron pairs
Covalent bonding happens when atoms share electron pairs. Atoms join together through covalent bonds to form a full electron shell, which boosts stability. By sharing their outermost (valence) electrons, atoms can fill out their outer electron shell and become stable. Nonmetals will swiftly create covalent bonds with other nonmetals in order to achieve stability.
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Which of the following is true?
a Liquids are denser than gases
b Liquids are less dense than gases
c Liquids and gases are the same density
d None of the above
Answers
Density of liquids is more than that of gases. Thus, the correct answer is (a).
A liquid has molecules that are closely spaced out. As a result, liquids have a higher density than gases.
The mass of a material per unit of volume is its density. Density is most frequently represented by the symbol ρ, but Latin letter D may also be used.
The amount of items in a space—which might include humans, animals, plants, or objects—is referred to as the space's density. Divide the number of items by the area's measurement to determine density. A country's population density is calculated by dividing its total population by its area, expressed in square kilometres or miles.
In comparison to liquids and gases, solids are denser than liquids and gases, respectively. The solid's particles are close to one another and have very little room to move. In a liquid, the particles are often still in contact, although there are gaps between them. There are considerable gaps between the gas particles.
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What characteristic of an epic hero does this passage
show?
the ability to embark on a long journey
the ability to receive help from a supernatural force
the ability to speak with confidence
Answers
The ability to speak with confidence shows the characteristic of an epic hero does this passage show. Option C is correct.
What is confidence?
The feeling or emotion or belief that one or a person can have faith in or trust on someone or for something that he or she is doing or about to do and the hero are the inspiration for the society.
In other words a feeling or emotion of self-assurance or self believe arising or rises from an appreciation or motivation of one's own abilities or qualities or performance.
Therefore, ability to speak with confidence shows the characteristic of an epic hero does this passage show. Option C is correct.
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Answer:
B
Explanation:
Cuz
Which degree does Linda need to obtain?
Linda wants to pursue a career in the veterinary field. She enjoys training and teaching students. So, she wants to become a veterinary professor.
To become a veterinary professor, Linda needs to obtain a
degree in veterinary medicine.
Answers
Answer:
Doctorate
Explanation:
Answer for PLATO
how do you know the simulation is depicting a decomposition reaction
Answers
Answer:
1.A decomposition reaction occurs when one reactant breaks down into two or more products. This can be represented by the general equation: AB → A + B.
Examples of decomposition reactions include the breakdown of hydrogen peroxide to water and oxygen, and the breakdown of water to hydrogen and oxygen.
Conduction occurs when thermal energy is transferred by the movement of
____
Answers
Answer:
Heat is transferred by conduction when adjacent atoms vibrate against one another, or as electrons move from one atom to another. Conduction is the most significant means of heat transfer within a solid or between solid objects in thermal contact.
Explanation:
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<(￣︶￣)>
Answer:
its molecules
Explanation:
2021 edge
Question
convert 70mi/hr into ft/s
Answers
Answer: 102 ft/s
Explanation: i did the math
What is the difference between bulk and particle scale?
Someone please help!!
Answers
Answer:
Particle density is the volumetric mass of the solid soil. It differs from bulk density because the volume used does not include pore spaces. Particle density represents the average density of all the minerals composing the soil.
Hope that helps
HELP POGGERS!!! I NEED HELP!!!!!!!!!! THIS IS NEEDED IN 10 MINS
Answers
Answer:
(3)
Explanation:
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