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Chemistry

What mass (in mg) does 2.63moles of nickel have?

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Trevor Blackburn

Chemistry

What does the energy hill represent on an energy diagram?

A. The potential energy gained by the products when a reaction

happens

B. The final amount of potential energy of the products of the

reaction

C. The potential energy the reactant's have stored in molecular bonds

D. The additionat potential energy the reactants must gain in order to

React

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Chemistry

Compared to the ideal angle, you would expect the actual angle between the bromine-oxygen bonds to be

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Chemistry

Iron is an important element in human body cells. If iron has an atomic number of 26, what does this tell you about this element?

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Diamond Padilla

Chemistry

Select all that apply. A scientific law: A - is generally accepted as true B - has never been found to be in error C - has no known contradictions D - must be reverified occasionally

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Chemistry

A volume of 125 mL of H2O is initially at room temperature (22.00 ∘C). A chilled steel rod at 2.00 ∘C is placed in the water. If the final temperature of the system is 21.30 ∘C, what is the mass of the steel bar? Use the following values:specific heat of water = 4.18 J / (g⋅∘C) specific heat of steel = 0.452 J / (g⋅∘C) Express your answer to three significant figures and include the appropriate units. mass of the steel =

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Chemistry

The volume of a gas is reduced from 4 l to 0.5 l while the temperature is held constant. what does the pressure of the gas do?

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Chemistry

In an experiment, an unknown gas effuses at one-half the speed of oxygen gas, which has a molar mass of 32 g/mol. which might be the unknown gas?

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Charlotte Cooke

Chemistry

7. Foam cup A has 36 mL of water that contain 2 moles of HCL at 20°C. Foam cup B has 36 mL of water that contain 2 moles NaOH of at 20°C. The contents of foam cup A are added to foam cup B and a chemical reaction occurs. The final temperature of the contents of cup B is 31°C. Calculate the enthalpy change of the reaction. The density of each solution is 1g/ml. A.-1.66 kj B.-3.31 kj C.-6.62 kj D.-13.2

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Chemistry

Which statement is false?

a. At equilibrium, equal amounts of products and reactants are present. ΔG° is a function of Keq.

b. When reactants become products, they do so through an intermediate transition state. Most biocatalysts are proteins.

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Chemistry

What is the name of a compound that has the formula C6H6

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Chemistry

A 8.53 g sample of BaCl2 barium chloride is reacted with silver nitrate to produce silver chloride and bariums nitrate to give 8.72 g of silver chloride. Write the balanced reaction, and find the theoretical yield and the percent yield of silver chloride.

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Chemistry

How does water vapor get into the atmosphere?

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Chemistry

Which statement a-d about a state function is not correct?

A - the value of a stage function can change along a path.

B-the final value of a state function is independent of the path taken to reach the final state.

C-all forms of energy must be State functions because energy is conserved in any process.

D-examples of State functions only occur in chemistry and physics and not in real life.

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Chemistry

100mL of water initially at 35°C is placed inside a calorimeter. What will be the final temperature in the calorimeter if 50g of aluminum initially at 100°C is added to the water?

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