Questions from General Chemistry

Q: Which of the following statements is(are) true?

Which of the following statements is(are) true? a. A balanced equation relates the numbers of molecules of reactants and products (or numbers of moles of reactants and products). b. To convert betwee...

Q: In studying heat flows for chemical processes, what do we mean

In studying heat flows for chemical processes, what do we mean by the terms system and surroundings?

Q: The mass fraction of an element present in a compound can be

The mass fraction of an element present in a compound can be obtained by comparing the mass of the particular element present in 1 mole of the compound to the mass of the compound.

Q: If the amount of a sample doubles, what happens to the

If the amount of a sample doubles, what happens to the percent composition of each element in the compound?

Q: Consider the equation: 2A + B 5C. If 10.

Consider the equation: 2A + B 5C. If 10.0 g of A reacts with 5.00 g of B, how is the limiting reactant determined? Choose the best answer and explain. a. Choose the reactant w...

Q: Balance the following chemical equation, and then answer the question below

Balance the following chemical equation, and then answer the question below. CuSO4(aq) + KI(s) CuI(s) + I2(s) + K2SO4(aq) Which reactant is the limiting reactant? Choose the best...

Q: When a chemical system evolves energy, where does the energy go

When a chemical system evolves energy, where does the energy go?

Q: The combustion of methane, CH4, is an exothermic process.

The combustion of methane, CH4, is an exothermic process. Therefore, the products of this reaction must possess (higher/ lower) total potential energy than do the reactants.

Q: Consider the gasoline in your car’s gas tank. What happens to

Consider the gasoline in your car’s gas tank. What happens to the energy stored in the gasoline when you drive your car? Although the total energy in the universe remains constant, can the energy stor...

Q: Although the total energy of the universe will remain constant, why

Although the total energy of the universe will remain constant, why will energy no longer be useful once everything in the universe is at the same temperature?