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Chemistry LibreTexts

Moles (Worksheet)

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Work in groups on these problems. You should try to answer the questions without referring to your textbook. If you get stuck, try asking another group for help.

1. How many moles of \(NaHCO_3\) are in 27.5 g \(NaHCO_3\)?

2. How many grams of \(H_2O_2\) are in 2.0 mol \(H_2O_2\)?

3. Given the following equation, complete the questions below.

 \[2H_2 + O_2 \rightarrow 2H_2O\]

  1. If you start with 5.0 mol \(H_2\), how many mol of \(H_2O\) is produced?
  2. If you start with 10.0 g \(H_2\), how many mol of \(H_2O\) is produced?
  3. If you start with 100.0 g \(H_2\), how many grams of \(H_2O\) is produced?

4. Given the following equation, complete the questions below.

\[8Al + 3Fe_3O_4 \rightarrow 4Al_2O_3 + 9Fe\]

  1. determine the number of moles of \(Fe\) produced from 2.0 moles of \(Al\).
  2. determine the number of mol of \(Fe\) produced from 1.0 moles of \(Fe_3O_4\).
  3. determine the number of moles of  \(Al_2O_3\) produced from 27.0 grams of \(Al\).
  4. determine the number of moles of \(Fe\) produced from 60.0 grams of \(Fe_3O_4\).
  5. determine the number of grams of \(Al\) needed to produce 100.0 grams of  \(Al_2O_3\).