Stoichiometric Calculations Answers

How many moles are in 40.2 g Cu? mol Cu

How many moles are in 14.1 g S? mol S

After determining the amount of moles required for one of the reactants, it was shown that was the limiting reactant and was the excess reactant.

After determining the amount of moles required for one of the reactants, it was shown that was the limiting reactant and was the excess reactant.

g H2O

Which reactant is the limiting reactant?

It was determined that H2 was the limiting reactant. What is the excess reactant?

The excess reactant is the reactant that is used up in a chemical reaction.

Sam follows the directions on a box of pancake mix. The box says that it makes 10 pancakes, but he is able to make 8 pancakes from the ingredients. In this case, the number 10 represents which type of yield?

Abby mixes 2 moles hydrogen with 1 mole oxygen to produce water. She expects to produce 2 moles water, but she captures 1.5 moles water. In this case, the value 1.5 moles represents which type of yield?

Paige heated 3.00 g mercury (II) oxide (HgO, 216.59 g/mol) to form mercury (Hg, 200.59 g/mol) and oxygen (O2, 32.00 g/mol). She collected 0.195 g oxygen. What was the percent yield of oxygen?%

The balanced chemical equation for the reaction is shown below: 2HgO 2Hg + O2Did you start with the correct equation?

Did you perform the calculations correctly?

Methane (CH4, 16.05 g/mol) reacts with oxygen to form carbon dioxide (CO2, 44.01 g/mol) and water (H2O, 18.02 g/mol). Assume that you design a system for converting methane to carbon dioxide and water. To test the efficiency of the system in the laboratory, you burn 5.00 g methane. The actual yield is 6.10 g water. What is your percent yield?%

The balanced chemical equation for the reaction is shown below: CH4 + 2O2 CO2 + 2H2ODid you start with the correct equation?

Did you perform the calculations correctly?