Chemistry

2.04 - The MoleAssignment 1/2

SCH4C Name:

Assignment: The Mole

Name:

1. If we have 1 mole of MgCl2 than we have 2 moles of chlorine and 1 mole of magnesium.

[3]

a) How many moles of sodium are in 1 mole of Na3P? _________________

b) How many moles of oxygen in 1 mole of CO2? _________________

c) How many moles of hydrogen in CH3CO2H? _________________

2. Determine the molar mass of the following elements. Include the unit g/mol. [4]

a) Xenon (Xe) ___________________ c) Barium (Ba) ____________________

b) Sulfur (S) ___________________ d) Calcium (Ca) ____________________

3. Determine the molar mass of the following compounds. Again, include units. Remember to use Rule #1: least

number of decimal places since you are adding. [4]

a) NH3 ___________________________ c) NaOH ___________________________

b) Fe2(SO4)3 ___________________________ d) AlPO4 ___________________________

4. Calculate the mass of each molar quantity. Include units. Remember to use Rule #2: least number of

significant digits since you will be multiplying. [4]

m = n x M a) 3.90 mol of carbon

b) 2.52 mol of O3

c) 55.6 mol of water, H2O

d) 1.5 mol NaCl

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2.04 - The MoleAssignment 2/2

5. Calculate the number of moles in each sample. Include units. Remember to use Rule #2: least number of

significant digits since you will be dividing. [6]

n = m/M a) 103 g of potassium

b) 0.736 g of silicon (Si)

c) 39.2 g of SiO2

d) 7.34 g of HNO3

e) 25 g of C6H12O6

f) 52.45 g of silver