SCH 3U – MOLE CALCULATIONS
SCH 3U – MOLE CALCULATIONS
|1. |Calculate the mass of |
| |a) 2.00 moles of water |
| |b) 4.38 moles of chlorine |
| |c) 0.025 moles of ammonia |
| |d) 1.8 moles of oxygen gas |
| | |
|2. |Calculate the number of moles in |
| |a) 25 g of helium |
| |b) 12.5 g of methane |
| |c) 0.364 g of iodine vapour |
| |d) 40.0 g of sodium |
|3. |Calculate the number of particles in |
| |a) 2.50 moles of Neon |
| |b) 0.050 moles of iron |
| | |
|4. |Calculate the number of moles in |
| |a) 9.03 X 1023 atoms of Cu |
| |b) 3.76 X 1025 molecules of SO2 |
| |c) 8.6 X 1018 electrons |
| | |
|5. |Calculate the number of molecules in |
| |a) 12.5 g of nitrogen |
| |b) 0.76 g of ammonia |
| |c) 0.60 g of hydrogen gas |
| | |
|6. |Calculate the mass of |
| |a) 4.25 X 1024 atoms of C |
| |b) 6.02 X 1021 molecules of H2O |
| |c) one trillion atoms of Zn |
| |d) one atom of U |
MORE MOLE QUESTIONS
|1. |How many particles are there in one mole? |
|2. |It is estimated that a sample of matter contains 1.38 X 1025 atoms. How many moles are present in the sample? |
|3. |How many moles of barium are present in a sample having a mass of 22.3 grams? |
|4. |A chemical reaction requires 3.7 moles of boron. What mass, in grams, of boron must be used in the reaction? |
|5. |A sample of naturally occurring carbon has a mass of 1.732 grams. Calculate the number of moles of carbon in this sample. |
|6. |A chemical reaction results in 57.2 grams of the gas carbon dioxide, CO2. How many molecules of gas were produced? |
|7. |Calculate the mass of one trillion molecules of oxygen gas. |
|8. |Calculate the number of moles in: |
| |a) 25 grams of oxygen gas |
| |b) 0.27 g of ammonia |
| |c) 10.5 g of sodium |
| |d) 347 g of ammonium nitrate |
|9. |Calculate the mass, in grams, of: |
| |a) 1.24 moles of water |
| |b) 0.269 moles of mmonium chloride |
| |c) 5.62 moles of sodium hydroxide |
| |d) 2.35 moles of sodium sulphate |
|10. |Calculate the number of molecules in: |
| |a) 3.00 moles of chlorine gas |
| |b) 3.00 moles of uranium hexafluoride |
| |c) 3.00 moles of hydrogen chloride gas |
| |d) 3.00 moles of any kind of molecule |
EVEN MORE MOLE QUESTIONS - Grams, Moles and Molecular Mass Worksheet
|1. |What is the mass of 0.100 mol of each of the substances given below: |
| |(a) Sodium carbonate |
| |(b) Ammonium tetraborate, (NH4)2B4O7 |
| |(c) Calcium cyclamate, Ca(C6H12NSO3)2 |
|2. |How many moles of sodium nitrate are in 1.70 grams of sodium nitrate, a substance used in fertilizers and to make gunpowder. |
|3. |Ammonium sulphate, is a fertilizer used to supply both nitrogen and sulphur. How many grams of ammonium sulphate are in 35.8 moles of |
| |ammonium sulphate. |
|4. |A 0.500 mol sample of table sugar, C12H22O11, weighs how many grams? |
|5. |A solution of zinc chloride, in water is used to soak the ends of wooden fenceposts to preserve them from rotting while they are stuck |
| |in the ground. One ratio used is 840 grams of zinc chloride to 4 L water. How many moles of zinc chloride are in 840 grams of zinc |
| |chloride? |
|6. |In the early 1970s, thallium sulphate, a powerful poison, was illegally used in poison baits to control predators such as coyotes on |
| |western rangelands. Hundreds of eagles died after taking these baits. A 1.00 kilogram can of thallium sulphate contains how many moles |
| |of this compound? |
|7. |Borazon, one crystalline form of boron nitride, is very likely the hardest of all substances. If one sample contains 3.02 X 1023 atoms|
| |of boron, how many atoms and how many grams of nitrogen are also in this sample? |
|8. |If iodine is not in a person's diet, a thyroid condition called goitre develops. Iodized salt is all that it takes to prevent this |
| |disfiguring condition. Calcium iodate, is added to table salt to make iodized salt. How many atoms of iodine are in 0.500 moles of |
| |calcium iodate? How many grams of calcium iodate are needed to supply this much iodine? |
|9. |Ammonium nitrate is used as a fertilizer and to manufacture explosives. How many atoms of nitrogen are in 0.665 moles of this |
| |substance? How many grams of ammonium nitrate supply this much nitrogen? |
|10. |Sodium perborate, is present in "oxygen bleach". It acts by releasing oxygen, which has bleaching ability. How many grams of sodium |
| |perborate are in 4.65 moles of this substance? |
|11. |Barium sulphate, is given to patients as a thick slurry in flavoured water before X-rays are taken of the intestinal tract. The barium |
| |blocks the X-rays, and the tract therefore casts a shadow that is seen on the x-ray film. How many grams are in 0.568 mole of barium |
| |sulphate. |
|12. |Calculate the number of grams in 0.586 mole of each of the following substances? |
| |(a) Water. |
| |(b) Glucose, a sugar in grape juice and honey. |
| |(c) Iron. |
| |(d) Methane. |
|13. |Calculate the number of moles of each substance in 100.0 grams of each of the following samples: |
| |(a) Ammonia |
| |(b) Cholesterol, C27H46O |
| |(c) Gold |
| |(d) Ethyl alcohol |
|14. |Why does 100.0 grams of ammonia, have so many more moles than 100.0 grams of cholesterol, C27H46O? |
|15. |A sample of a compound with a mass of 204 grams consists of 1.00 x 1023 molecules. What is its formula weight? |
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