# General Chemistry 1: Mole Calculations

What is the molar mass of H$_2$O ?

What is the molar mass of NaCl $\cdot$ 2 H$_2$O ?

Convert 8.30 x 10$^{24}$ atoms to moles of atoms. Use dimensional analysis and show how the units cancel to give the correct answer.

Convert 5 moles of carbon to grams.

Convert 15 grams of CO$_2$ to moles of CO$_2$

How many atoms are in 1.00 x 10$^{-9}$ g of lead?

How many grams of iron are in a 15.0 g sample of Fe$_2$O$_3$ ? (molar mass of Fe$_2$O$_3$ = 159.69 g/mol)

A typical aspirin, C$_9$H$_8$O$_4$ , tablet contains 0.36 g. How many molecules are present?

A sample of 45.8 g of MgSO$_4$ $\cdot$ 4 H$_2$O contains how many moles of MgSO$_4$ $\cdot$ 4 H$_2$O ?

How many moles of sodium ions, Na$^{+}$, are there in 5.63 g of Na$_2$SO$_4$ ? (molar mass of Na$_2$SO$_4$ = 124.04 g/mol)

How many grams of silver are in 0.263 mol of Ag??

How many moles of nitrogen atoms are in 15.0 g of N$_2$O$_5$ (calculate with molar mass of N$_2$O$_5$ = 108.010 g/mol) ?