mole conversion practice problems - FAIRHAVEN HIGH …

1 Name: _____ date: _____ mole conversions - practice problems It is important to be able to convert between units of mass and volume measurement and moles. The mole is a unit for counting atoms and molecules representing 602,000,000,000,000,000,000,000 particles. This is often written as 1023 particles and is known as Avogadro s number. Using the periodic table it is possible to calculate the molar mass, or the mass of a single mole of a substance. The molar volume is the volume of a single mole of gaseous substance.

2 All gases have the same molar volume when measured at standard temperature and pressure or STP, which is liters per mole. amount (moles)mass (grams)volume (liters)particles1 molmolar mass 1 L 1 1023 particles mole conversion chartexample: Calculate the number of molecules in grams of calcium chloride, CaCl2. -develop a strategy: -calculate and solve: grams moles g CaCl2 1 mol111 g 1023 particles1 mol = 1021 particles of CaCl2practice problems : 1. A sample of neon has a volume of L at STP.

3 Calculate the number of moles. 2. Calculate the mass of an mole sample of iron. 3. Convert g of sodium hydroxide, NaOH, into moles. 4. Calculate the number of molecules in a sample of carbon dioxide with a mass of grams. 5. Calculate the number of moles of potassium nitrate, KNO3, in a sample with a mass of grams. 6. Calculate the mass of moles of sodium bicarbonate, NaHCO3. 7. Convert liters of carbon tetrafluoride, CF4, to grams. 8. Calculate the mass of gold atoms. 9. Calculate the volume, in liters, of 7500 g of helium atoms.

4 Assume STP conditions. 10. Calculate the number of particles in grams of NaCl. 11. Calculate the mass of molecules of water. 12. Calculate the volume of grams of NO gas at 1021 particles of CaCl2name: suggested answers date: _____ mole conversions - practice problems It is important to be able to convert between units of mass and volume measurement and moles. The mole is a unit for counting atoms and molecules representing 602,000,000,000,000,000,000,000 particles. This is often written as 1023 particles and is known as Avogadro s number.

5 Using the periodic table it is possible to calculate the molar mass, or the mass of a single mole of a substance. The molar volume is the volume of a single mole of gaseous substance. All gases have the same molar volume when measured at standard temperature and pressure or STP, which is liters per mole. example: Calculate the number of molecules in grams of calcium chloride, CaCl2. -develop a strategy: -calculate and solve: amount (moles)mass (grams)volume (liters)particles1 molmolar mass 1 L 1 1023 particles mole conversion chartgrams moles g CaCl2 1 mol111 g 1023 particles1 mol practice problems : 1.

6 A sample of neon has a volume of L at STP . Calculate the number of moles. mol Ne 2. Calculate the mass of an mole sample of iron. g Fe 3. Convert g of sodium hydroxide, NaOH, into moles. mol NaOH 4. Calculate the number of molecules in a sample of carbon dioxide with a mass of grams. molecules CO2 5. Calculate the number of moles of potassium nitrate, KNO3, in a sample with a mass of grams. mol KNO3 6. Calculate the mass of moles of sodium bicarbonate, NaHCO3. g NaHCO3 7. Convert liters of carbon tetrafluoride, CF4, to grams.

7 G CF4 8. Calculate the mass of gold atoms. g Au 9. Calculate the volume, in liters, of 7500 g of helium atoms. Assume STP conditions. 42000 L He 10. Calculate the number of particles in grams of NaCl. particles NaCl 11. Calculate the mass of molecules of water. g H2O 12. Calculate the volume of grams of NO gas at STP. L NO