CHEMISTRY 11
Mr. Bellman
Ch 10
Basic Mole Calculations
Review wkst 1-4 ( 16 )
NAME____________________
Date______________Bk_____
ANY OF THESE COULD BE ON YOUR QUIZ 2
REMEMBER…………. SIG FIGS AND SHOW ALL WORK WITH UNIT CANCELLATION (ANSWERS ARE IN BRACKETS!!!!)
1. Determine the molecular and molar mass of ammonium sulfate. ( 132.1 amu, 132.1 g)
2. Determine the mass, in g, of 4.11 moles of SO2. ( 263 g )
3. Determine the number of moles in 3.45 x 1022 molecules of N2 ( 0.0573 moles )
4. Determine the volume, in L, of 3.5 moles of argon gas at STP. ( 78 L )
5. Determine the mass, in g, in 8.26 x 1024 molecules of H2O ( 247 g )
6. Determine the volume, in L, of 35.00 g of chlorine gas at STP. ( 11.0 L )
7. What is the density in g/mL of nitrogen dioxide gas, NO2 (g) , at STP? ( 0.00205 g/mL or 2.05 x 10-3 g/mL )
8. Determine the total number of atoms in one molecule of iron ( III ) bicarbonate. ( 16 atoms )
9. Determine the total number of oxygen atoms in 0.65 g of iron ( III ) bicarbonate. ( 1.5 x 1022 O atoms )
10. Would 1.00 mole of dice (1.0 cm x 1.0 cm x 1.0 cm) cover the planet Earth? Prove it! You need the surface area of
the Earth which is 5.1 x 108 km2 unless you knew that already. (The answer is YES!!! Since a mole of dice covers an area
of 6.0 x 1013 km2 and thus would not only cover the Earth once but cover it over 117 000 times! Oops. Siggie figgies!
Over 120 000 times!)
Mass (g)
1 mol
x grams
x grams
1 mol
6.02 x 1023
1 mol
1 mol
6.02 x 1023
MOLES
22.4 L
1 mol
Molecules /
atoms
1 mol
22.4 L
Volume of gas
At STP