Stoichiometry

Front

If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the _____?

Back

theoretical yield

Front

What is the measured amount of a product obtained from a chemical reaction?

Back

actual yield

Front

Mole ratios are obtained from the _____. Options: balanced chemical equation, periodic table, molar mass

Back

balanced chemical equation

Front

What is the mole ratio of H₂O to H₃PO₄ in the chemical equation P₄O₁₀ + 6 H₂O --> 4 H₃PO₄?

Back

6:4

Front

When does a chemical reaction stop?

Back

When the limiting reactant is used up

Front

2 KClO₃ → 2 KCl + 3 O₂
How many moles of oxygen are produced when 6.7 moles of KClO₃ decompose completely?

Back

10.1 mol

Front

2Na + 2H₂O → 2NaOH+ H₂ Assuming H₂O is in excess, how many grams of hydrogen can be produced with 120 g of Na?

Back

5.2 g

Front

SiO₂ + 3C → SiC + 2CO
I need to add 8 moles of Carbon to the reaction. How many grams of Carbon should I weigh?

Back

96 g

Front

A chemist interested in the efficiency of a chemical reaction would calculate the _____. Options: mole ratio, rate of reaction, percent yield, energy released

Back

percent yield

Front

What is an excess reactant?

Back

what you have left over