Questions from General Chemistry

Q: Consider the unbalanced equation for the combustion of propane: C3H8

Consider the unbalanced equation for the combustion of propane: C3H8(g) + O2(g) / CO2(g) + H2O(g) First, balance the equation. Then, for a given amount of propane, write the mole ratios that would e...

Q: In the practice of chemistry one of the most important calculations concerns

In the practice of chemistry one of the most important calculations concerns the masses of products expected when particular masses of reactants are used in an experiment. For example, chemists judge...

Q: What is meant by a limiting reactant in a particular reaction?

What is meant by a limiting reactant in a particular reaction? In what way is the reaction “limited”? What does it mean to say that one or more of the reactants are present in excess? What happens to...

Q: For a balanced chemical equation of your choice, and using 25

For a balanced chemical equation of your choice, and using 25.0 g of each of the reactants in your equation, illustrate and explain how you would determine which reactant is the limiting reactant. Ind...

Q: After studying a few chapters of this text, and perhaps having

After studying a few chapters of this text, and perhaps having done a few lab experiments and taken a few quizzes in chemistry, you are probably sick of hearing the term significant figures. Most chem...

Q: What do we mean by the theoretical yield for a reaction?

What do we mean by the theoretical yield for a reaction? What is meant by the actual yield? Why might the actual yield for an experiment be less than the theoretical yield? Can the actual yield be mor...

Q: Consider 2.45-g samples of each of the following

Consider 2.45-g samples of each of the following elements or compounds. Calculate the number of moles of the element or compound present in each sample. a. Fe2O3(s) b. P4(s) c. Cl2(g) d. Hg2O(s)...

Q: A compound was analyzed and was found to have the following percent

A compound was analyzed and was found to have the following percent composition by mass: sodium, 43.38%; carbon, 11.33%; oxygen, 45.29%. Determine the empirical formula of the compound.

Q: For each of the following balanced equations, calculate how many grams

For each of the following balanced equations, calculate how many grams of each product would form if 12.5 g of the reactant listed first in the equation reacts completely (there is an excess of the se...

Q: Solid calcium carbide (CaC2) reacts with liquid water to produce

Solid calcium carbide (CaC2) reacts with liquid water to produce acetylene gas (C2H2) and aqueous calcium hydroxide. a. Write the balanced equation for the reaction that is occurring, including all p...