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) ?