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The “Moley, Moley Moley” Mole Concept Worksheet
1. How many atoms or molecules are present in each of the following?
a) 1.0 mol of Au(s) atoms
b) 2.5 mol of He(g) atoms
c) 10.0 mol of H2(g) molecules
d) 0.628 mol of CO2(g) molecules
2. How many moles are present in each of the following?
a) 28g of sodium
b) 28g of iron
c) 150g of zinc
d) 100.0g of NaCl
e) 26.0g of N2(g)
3. What is the mass of each sample?
a) 2.3 mol of nickel atoms
b) 4.2 mol of carbon dioxide molecules
c) 5.0 mol of water
d) 36.8 mol of MgCl2(s)
e) 0.00127 mol of Al2S3(s)
4. What is the mass of 3.01 x 1023 atoms of copper?
5. How many molecules of water are in 1000g of water?
6. How many oxygen atoms are in 64g of oxygen gas (O2)?
7. Which contains more atoms: a mole of iron or a mole of oxygen gas? Explain.
8. How many moles are in each of the following?
a) 8.00g of He(g)
b) 11.50g of Na(s)
c) 72.08g of H2O(g)
d) 0.251g of Na2SO4(s)
e) 6.2kg of KCl(s)
9. What is the mass of each of the following samples?
a) 2.08 mol of silver atoms?
b) 0.50 mol of Pb(s) atoms?
c) 10 mol of O2(g) molecules?
d) 9.67 mol of carbon disulfide?
e) 0.832 mol of calcium carbonate?
10. How many atoms or molecules are present in each of the following?
a) 2.0 mol of Al(s) atoms
b) 36.0 mol of SO3(g) molecules
c) 0.023 mol of Xe(g) atoms?
11. How many moles are present in each of the following?
a) 931g of NH3(g)
b) 1.63 x103 g of CuCO3
c) 391g of H3SO4
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