Answer:
B
Explanation:
Malleability describes a substance's ability to deform under pressure and heat
Examples: Gold, iron, aluminum, copper, silver, and lead. Gold and silver are highly malleable. When a piece of hot iron is hammered it takes the shape of a sheet.
16.87mg LiBr in 328.1mL of solution. Express molarity in moles per...
16.87mg LiBr in 328.1mL of solution.
Express molarity in moles per liter to four significant figures.
The molarity (in mole per liter), given that 16.87 mg of LiBr is in 328.1 mL of solution is 0.0004 mole per liter
How do i determine the molarity of the solution?First, we shall obtain the mole of 16.87 mg of LiBr. This is shown below:
Mass of LiBr = 16.87 mg = 16.87 / 1000 = 0.01687 gMolar mass of LiBr = 86.845 g/molMole of LiBr = ?Mole of LiBr = mass / molar mass
= 0.01687 / 86.845
= 0.000194 mole
Finally, we shall determine the molarity. This is shown below:
Mole of LiBr = 0.000194 moleVolume = 328.1 mL = 328.1 / 1000 = 0.3281 LMolarity = ?Molarity = mole / volume
= 0.000194 / 0.3281
= 0.0004 mole per liter
Thus, the molarity is 0.0004 mole per liter
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Shauna is looking over her family history for heart disease and thought about the easiest way to represent what she discovered. What model is used to show the pattern of traits that are passed from one generation to the next in a family?
dichotomous key
pedigree chart
line graph
punnett square
please help me im so lost!
Answer:
An atom consists of a positively charged nucleus, surrounded by one or more negatively charged particles called electrons. The positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. ... The nucleus of an atom contains protons and neutrons.
Explanation:
i'm smart you are too in your own way.
What process does the body use for transporting broken down molecules?
The process used by the body for transporting broken-down molecules is known as passive transport.
This process involves the movement of molecules in and out of cells without the use of energy or the need for ATP. Passive transport occurs through a variety of mechanisms, including diffusion, osmosis, and facilitated diffusion.
In diffusion, molecules move from an area of higher concentration to an area of lower concentration until the concentration of the molecules is equal.
Osmosis is the diffusion of water molecules through a selectively permeable membrane from a high concentration of water to a low concentration of water.
Facilitated diffusion is the process by which molecules move through protein channels in the cell membrane. This process does not require the use of energy and is a type of passive transport.
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What relationship is described by the arrhenius equation, k = ae -(ea / rt)?
The Arrhenius equation describes the relationship between the rate constant (k) of a chemical reaction and the temperature (T) at which the reaction occurs. The equation is given as:
k = Ae^(-Ea/RT)
where A is the pre-exponential factor or frequency factor, Ea is the activation energy required for the reaction to occur, R is the gas constant, and e is the base of the natural logarithm.
The Arrhenius equation indicates that as the temperature of a chemical reaction increases, the rate constant also increases exponentially.
The activation energy term (Ea) represents the minimum energy required for reactants to form products, and the pre-exponential factor (A) represents the frequency of successful collisions between reactant molecules.
This equation is commonly used in the study of chemical kinetics, which is the study of the rates of chemical reactions and the factors that affect them.
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A high altitiude balloon contains 30.0 L of He gas at 103kPa. What is the volume when the balloon rises to an altitiude where the pressure is only 25.0kPa? Assume the temp is constant. (BOYLES LAW) 15 points pls help
124 L is the correct answer
Thus, the volume of the helium is 124 L when the balloon rises to an altitude where the pressure is only 25 kPa.
What is temperature ?
Temperature is a measure of the thermal energy of a substance or system. It reflects the degree of hotness or coldness of a material, and is a crucial parameter in many physical and biological systems. It is usually measured in units of kelvins, Celsius, or Fahrenheit. The Kelvin scale is an absolute temperature scale, where 0 K represents absolute zero, the temperature at which all matter has no thermal energy. The Celsius and Fahrenheit scales are relative temperature scales, with 0°C and 32°F defined as the freezing point of water and 100°C and 212°F defined as the boiling point of water.
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When is a rock considered an ore?
Check all that apply.
-when it occurs in sufficient amounts to be used to build roads and buildings
-only when it contains lead
-when it contains at least one metallic mineral in sufficient amounts to be extracted profitably
-only when it contains iron
-when it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably
The correct statements are that a rock is considered an ore when it contains at least one metallic mineral in sufficient amounts to be extracted profitably and when it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably.
When it contains at least one metallic mineral in sufficient amounts to be extracted profitably.
When it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably.
Step-by-step explanation:
When it occurs in sufficient amounts to be used to build roads and buildings: This statement is incorrect. Rocks that are used for construction purposes, such as limestone or sandstone, are not considered ores unless they also contain economically valuable minerals.
Only when it contains lead: This statement is incorrect. Ores are not limited to containing only lead. Ores can contain various metallic minerals, not just lead.
When it contains at least one metallic mineral in sufficient amounts to be extracted profitably: This statement is correct. Ores are rocks that contain valuable metallic minerals in concentrations that make extraction economically feasible. These minerals can include gold, silver, copper, aluminum, zinc, and many others.
Only when it contains iron: This statement is incorrect. While iron ores are commonly known and widely used, ores are not limited to containing only iron. There are numerous other metallic minerals that can be extracted profitably from rocks.
When it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably: This statement is correct. Fluorite and sulfur are examples of non-metallic minerals that can be extracted profitably from rocks, and if a rock contains these minerals in sufficient quantities, it can be considered an ore.
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Which of the two substances would have a higher melting point: O2 or quartz (SiO2)n? Explain your answer.
Answer:
quartz (SiO2)n
Explanation:
Melting point is defined as the temperature or point at which the substances change its state from solid to liquid.
Quartz (SiO2)n has high melting point than O2 because Quartz (SiO2)n is found in the form of hard, crystalline mineral that is made up of silicon and oxygen atoms having strong covalent bonds between all the atoms. So, a lot of energy is required to break the bond between the atoms and it has a high melting point.
Hence, the correct answer is quartz (SiO2)n.
calculate the producer surplus for a landscaper who is hired to work for $50/hour, but is willing to work for $40/hour.
The producer surplus for a landscaper who is hired to work for $50/hour but is willing to work for $4willing to work for $40/hour, but they are receiving $50/hour, which is $10/hour more than what they are willing to work for.
Producer surplus is defined as the amount that producers benefit by selling their product at a higher price than they would be willing to sell for. The difference between the actual price and the minimum price the producer would be willing to accept is the producer surplus.
the producer surplus of a landscaper who is hired to work for $50/hour, but is willing to work for $40/hour will be calculated. The producer surplus of a landscaper who is hired to work for $50/hour but willing to work for $40/hour is $10/hour. The landscaper is ing to work for. Producer surplus is the difference between the amount that the producer
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Water is a liquid at room temperature. this is due to?
Solution: Water is liquid at room temperature because the molecules of water are bound by H bonding so the water molecules are not able to move freely and behave as a liquid.
Solid, liquid and gases differ in their densities, their arrangement of atoms/ molecules and their bonding or force of attraction between the atoms/ molecules. Water is liquid because molecules of water have medium intermolecular space between them and weak force of attraction which allow the molecules of water to move within the limit so it can only flow. Another reason for the liquid nature of water is presence of H bonding which hold the water molecules and don’t let them move freely. The energy needed to break the H bond is moderate and not available at room temperature. Hence water is liquid at room temperature.
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what is the net ionic equation of:
Ca(OH)2(aq) + FeCl3(aq) → Fe(OH)3___+CaCl₂
Answer:
2OH-(aq) + Fe3+(aq) → Fe(OH)3(s)
Explanation:
The balanced molecular equation for the reaction between calcium hydroxide (Ca(OH)2) and iron(III) chloride (FeCl3) is:
Ca(OH)2(aq) + FeCl3(aq) → Fe(OH)3(s) + CaCl2(aq)
To write the net ionic equation, we first need to break down the soluble reactants and products into their respective ions:
Ca(OH)2(aq) → Ca2+(aq) + 2OH-(aq)
FeCl3(aq) → Fe3+(aq) + 3Cl-(aq)
Fe(OH)3(s) → Fe3+(aq) + 3OH-(aq)
CaCl2(aq) → Ca2+(aq) + 2Cl-(aq)
Next, we need to identify the spectator ions, which are ions that appear on both sides of the equation and do not participate in the reaction. In this case, the spectator ions are Ca2+ and 2Cl-.
Therefore, the net ionic equation is:
2OH-(aq) + Fe3+(aq) → Fe(OH)3(s)
This equation shows the actual chemical change that occurs during the reaction, with only the ions and molecules that participate in the reaction shown.
Which 2 layers of Erath are similar?
According to the research, the correct answer is that inner core and the outer core are geological layers of the Earth, which are similar in composition and both are extremely hot.
What is the core of the Earth?It refers to the innermost sector of the planet, being the layer formed mainly by iron and nickel whose internal pressure is higher than the pressure of the earth's surface.
In this sense, the inner core and outer core of the Earth are composed of iron-nickel or alloys thereof, with some other elements exhibiting high temperatures but unlike the solid inner core of the Earth, the outer core is liquid since there is not enough pressure to keep it in a solid state.
Therefore, we can conclude that according to the research, a wide range of concentrations of iron and nickel is found in the outer and inner core of the Earth.
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Question 32 convert 0.23 moles h2o to number of molecules. o 3.8 x 10-25 o 0.0039 o 1.39 x 1023 o 13.4 question 33 what are the products in the single displacement reaction of ca and hci. o cacl, h2 o cazci, h2 o cacl2, h2 o capci, h2 question 34 what are the products in the double displacement reaction, na2so4 + nh4ci -->o nacl, (nh4)2so4 o na2ci, (nh4)2so4 o nh4n, ciso4 o co2, h20 click save and submit to save and submit. click save all answers to save all answers 3623
A) The number of H₂O molecules in 0.23 moles is equal to 1.5 × 10²³.
B) The single displacement reaction is,
Ca + 2HCl → CaCl₂ + H₂
C) The double displacement reaction is,
Na₂SO₄ + 2NH₄Cl → 2NaCl + (NH₄)₂SO₄
Displacement reaction: What is it?A displacement reaction is one in which a set of atoms in a molecule are replaced by another set of atoms.
When an element leaves its compound or when one element is replaced by another from its own compound, a single displacement reaction can be demonstrated as a type of redox reaction.
In aqueous solutions, double displacement reactions take place where ions precipitate and exchange ions.
Hydrogen gas and calcium chloride are produced in a single displacement reaction between calcium and HCl acid.
Ca + 2HCl → CaCl₂ + H₂
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Hydrogen and oxygen react under a specific set of conditions to produce water according to the following equation.
2 H2(g) + O2(g) 2 H2O(g)
(a) How many moles of hydrogen would be required to produce 2.8 mol of water?
(b) How many moles of oxygen would be required?
Answer:
fccdsetyujvreettyukknop
Explain on any two materials that you would expect to use for the wheelchair (both back support and
arm support) with less generation of heat during the hot summers.
Answer:
In the backrest use materials where it is easy to clean and where they do not absorb fluids, in this way it would be cooler, such as an ecological leather simulator.
And in the armrest as well, but in both areas we must not rule out that if or if it should have even a minimum of padded surface so that the patient or the person who spends most of the day in the wheelchair does not suffer from joint pain.
Explanation:
Some wheelchair factories also implement modern chairs where they are made of stainless steel structures lined with padded material with perforated fabrics that allow breathing and aeration of body areas that have contact with the fabric.
Which one is NOT part of the brain?
O cerebral cortex
Frontal Lobe
cerebral palsy
hippocampus
Answer:
The awnser is cerebral palsy
Explanation:
that is a medical condition caused when there is not enough oxygen to the brain at birth
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if an ion has 26 protons and 24 electrons what is the charge on the ion?
Answer:
+2
Explanation:
Protons are positive and electrons are negative, this ion has more positive charges than negative charges therefore the overall charge of the ion is +2.
+26 + -24 = +2
If an ion has 26 protons and 24 electrons, the charge of the ion will be +2.
HOW TO DETERMINE CHARGE OF AN ION:
The charge of an ion can be determined by subtracting the number of electrons from the number of protons in the atom. Charge = no. of protons - no. of electronsAccording to this question, an ion has 26 protons and 24 electrons. This means that the charge of the ion can be calculated as follows:Charge of ion = 26 protons - 24 electrons = +2. Therefore, if an ion has 26 protons and 24 electrons, the charge of the ion will be +2.Learn more about how to calculate charge of an ion at: https://brainly.com/question/14471616?referrer=searchResults
nonenzymatic e1 reactions can often result in a mixture of more than one alkene product. elimination of 'hx' from the following starting compound, for example, could yield three different possible alkene products, true or false?
The given statement is true that nonenzymatic E1 reactions can often result in a mixture of more than one alkene product. This is due to the presence of different possible elimination products.
Nonenzymatic E1 reactions: E1 is a chemical reaction mechanism that includes the elimination of a leaving group (such as HX) from an organic molecule to create a double bond or alkene. This is a two-step process in which the first step is the formation of a carbocation intermediate.The nonenzymatic E1 reactions can often result in a mixture of more than one alkene product because the carbocation intermediate that forms can be attacked by nucleophiles in various directions, leading to the formation of different elimination products. The regiochemistry of the reaction is determined by the most stable carbocation intermediate formed from the initial step of the reaction.In this case, elimination of HX from the given starting compound can yield three different possible alkene products due to the presence of three different hydrogen atoms that can eliminate. Hence, the given statement is true.Learn more about E1 reactions: https://brainly.com/question/30887510
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What are the conditions that are required for electrical energy to be present in an electrical circuit?
Answer:
a supply of electric charges which are free to flow, some form of push to move the charges through the circuit and a pathway to carry the charges.
Explanation:
There's your answer have a good day
the enthalpy change for the reaction is -67 kj. is the reaction endothermic or exothermic? is energy absorbed or released as the reaction occurs?
Given that the enthalpy change for the reaction is -67 kJ, the reaction is exothermic, and energy is released as the reaction occurs.
Enthalpy refers to the amount of energy that is stored in a compound's chemical bonds or the heat released or absorbed during a chemical reaction. It is a thermodynamic property that determines the quantity of energy released or absorbed during a process such as chemical reaction or change in state.
When a reaction absorbs energy from its surroundings, it is known as an endothermic reaction. The reaction's enthalpy, which is the energy released or absorbed during a reaction, is positive. The system absorbs energy, which is why it is denoted by a positive value.
When a reaction releases energy into the surrounding, it is referred to as an exothermic reaction. The reaction's enthalpy, which is the energy released or absorbed during a reaction, is negative. The system releases energy, which is why it is denoted by a negative value.
Therefore, the reaction is exothermic and energy is released when the reaction occurs.
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what is ZnCl2 name and formula
Answer:
Zinc chloride is the name of chemical compounds with the formula ZnCl2 and its hydrates
please help me lol
How many grams of magnesium sulfate (MgSO4) are dissolved in 0.965 L of a 0.0575 M solution? Molar Mass Mg: 24.30 g/mol Molar Mass S: 32.06 g/mol Molar Mass O: 16.00 g/mol
Answer:
in 4 liters of solution
MgSO4) are dissolved in 0.965 L of a 0.0575 M solution? Molar Mass Mg: 24.30 g/mol Molar Mass S: 32.06 g/mol Molar Mass O: 16.00 g/
Answer:
6.68
Explanation:
i did it and got it right
HELP!! URGENT!! WILL GIVE BRAINIEST
Answer:
11. Mn (CH 3 CO 2) 2. (H 2 O) n where n = 0, 2, 4.
12. Au2O
Explanation:
Hope this helps
How can you get a real gas to behave like the LEAST like an ideal gas (minimize attraction between particles)?
A real gas behaves least like an ideal gas under the conditions of low temperature and high pressure.
This is because at low temperature and high pressure molecules of gas will have negligible kinetic energy and strong force of attraction. Thus, real gas will not behave like an ideal gas.
Whereas at high temperature and low pressure a real gas will behave like an ideal gas.
Answer: No real gas is ideal. All molecules have a volume and intermolecular forces of attraction. So a "real molar volume" is different from an ideal molar volume.
Explanation: I hope this help
Rate of respiration ___ when pyruvate is added to NaF because pyruvate overcomes the inhibition of NaF by increasing the concentration of substrate which is then used in the krebs cycle
Sodium fluoride (NaF) is a competitive inhibitor of the enzyme enolase, which is involved in the glycolysis pathway of cellular respiration. When NaF is added to a respiration reaction, it can inhibit the production of pyruvate and consequently decrease the rate of respiration.
However, the addition of pyruvate to a NaF-inhibited respiration reaction can overcome this inhibition by increasing the concentration of substrate available for the Krebs cycle. The Krebs cycle, also known as the citric acid cycle, is responsible for producing ATP, NADH, and FADH2 from acetyl-CoA, which is derived from pyruvate.
By increasing the concentration of pyruvate, the rate of respiration can increase because more pyruvate can be converted to acetyl-CoA, providing more substrate for the Krebs cycle. This leads to an increase in the production of ATP and other products of cellular respiration.
Overall, the addition of pyruvate to a NaF-inhibited respiration reaction can overcome the inhibition of NaF by increasing the concentration of substrate available for the Krebs cycle and ultimately leading to an increase in the rate of respiration.
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On the left a Circuit A, which is a square box. The top, left, and right sides have circles with X's in them. The bottom side has a stack of vertical lines, which are from left to right very short, short, very short, short. On the right a Circuit B, which is a square box. 2 extra lines cross the box near its top, parallel with the top side. The top side and the 2 extra lines have circles with X's in them. The bottom side has a stack of vertical lines, which are from left to right very short, short, very short, short.
Use the diagram and drop-down menus to answer each question.
Which circuit is a parallel circuit?
Which circuit is a series circuit?
In which circuit do the light bulbs all shine at their maximum brightness?
Answer:
B A B sorry if its wrong
Explanation:
Circuits can be connected in series or parallel but the maximum voltage is obtained in series connection, thus, light bulbs shine brightest in series connection.
What is parallel and series connection in a circuit?A parallel circuit connection is one in which the terminals of all the components in th circuit meet at two points.
The components are parallel to each other and current flows in multiple directions.
A series connection in a circuit is one in which the terminals of the component parts in a circuit are joined end to end. Current flows in one direction.
The voltage in a series connection is the sum of all the individual cells, therefore, the light bulb in series connection shines brightest.
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A scientific ________ must have a control, so that the variables that could affect the out come is reduced. A:experiment B:conclusion. C:investigation. D:reasoning
Answer:
A.experiment
Explanation:
hope this helps
Which of the following is the incorrect IUPAC name of a compound?
A. Pent-3-ene
B. Prop-1-en-2-yne
C. 1-methylpropane
D. All are incorrect.
The IUPAC names of the following organic compounds are correct with the given naming conventions:A. Pent-3-eneB. Prop-1-en-2-yneC. 1-methylpropaneD. All are incorrect - This is the incorrect option because all the given options have correct IUPAC names of the organic compounds. Hence, option D is incorrect.
The International Union of Pure and Applied Chemistry (IUPAC) is an organization that establishes a set of rules for the naming of chemical compounds. This is done to make sure that all scientists in the world use the same names for the same compounds. Therefore, the names should be unique and unambiguous. The IUPAC name of a compound provides information about its molecular structure, functional groups, and substituents. Some of the examples are given below:A. Pent-3-ene - It is a five-carbon molecule with a double bond between the third and fourth carbons. Hence, the name of the compound is pent-3-ene.B. Prop-1-en-2-yne - It is a three-carbon molecule with a triple bond between the first and second carbons and a double bond between the second and third carbons. Hence, the name of the compound is prop-1-en-2-yne.C. 1-methylpropane - It is a three-carbon molecule with one methyl group attached to the first carbon. Hence, the name of the compound is 1-methylpropane.
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the element to atomic 35 belong to_____ A, s-block B,P-block c, d-block D,f-block
Answer:
B
Explanation:
p block bc its last orbit is 4p5
Answer:
Explanation:
P. block
Calculate the amount of heat needed to boil 154.g of water ( H2O ), beginning from a temperature of 24.3°C . Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol.
The amount of heat needed to boil 154 g of water, beginning from a temperature of 24.3°C, is approximately 397,000 J (rounded to 3 significant digits), with the unit symbol "J" for joules.
To calculate the amount of heat needed to boil 154 g of water, starting from 24.3°C, follow these steps:
Step 1: Determine the heat needed to raise the temperature of the water to its boiling point (100°C). To do this, use the formula: q = mcΔT, where q is the heat, m is the mass of the water, c is the specific heat capacity of water (4.18 J/g°C), and ΔT is the change in temperature.
Step 2: Calculate ΔT: ΔT = 100°C (boiling point) - 24.3°C (starting temperature) = 75.7°C.
Step 3: Calculate the heat needed to raise the temperature: q = (154 g) × (4.18 J/g°C) × (75.7°C) ≈ 49,000 J.
Step 4: Calculate the heat needed to change the water from liquid to gas. Use the formula: q = mL, where L is the heat of vaporization for water (2.26 x 10^3 J/g).
Step 5: Calculate the heat needed to vaporize the water: q = (154 g) × (2.26 x 10^3 J/g) ≈ 348,000 J.
Step 6: Add the heat needed to raise the temperature and the heat needed to vaporize the water: 49,000 J + 348,000 J = 397,000 J.
So, the amount of heat needed to boil 154 g of water, beginning from a temperature of 24.3°C, is approximately 397,000 J (rounded to 3 significant digits), with the unit symbol "J" for joules.
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