University:
Campbell University
Course:
CHEM 111 | General Chemistry I
Academic year:

2024
Views:

41

Pages:

2
Author:

arpejanta3so

Science 10 Honours THE MOLE WORKSHEET #1 Do these problems on a separate piece of paper. Show all of your work. Remember sigfigs! And Units! 1. Calculate the molar mass of each of the following compounds. a. K2S04 e. Ni(CN)2 i. copper (I) carbonate b. H3PO4 f. KH2P04 j. copper (II) carbonate c. NH4CI g. iron (II) sulphate k. dinitrogen trioxide d. Na3P04 h. iron (III) sulphate l. aluminum sulphate 2. What is the mass of one mole of each of the following compounds? a. AgCl c. chromium (IV) oxide b. MgCr04 d. carbon tetrachloride 3. Determine the number of moles in: a. 29.3 g of Cu b. 1.25 kg of Pb c. 155 g o f P205 d. 109.2 g of A1 e. 345 mg of Hg f. 783 mg 02 4. How many grams are there in: a. 2.667 moles of Zn b. 2.31 x 103 moles of Li c. 5.83 moles of Cr2C>3 d. 0.298 moles of Au e. 34.6 moles of Fe f. 872 moles of 02 5. How many atoms are there in: a. 4.32 moles of Ag b. 5.12 x 10~8 moles of Co c. 23.4 moles of Zn3(P04)2 d. 0.276 moles of Na e. 9.87 moles of K f. 1.452 x 1012 moles of 02 6. How many: a. atoms of Cl in 23.4 g of CC14 b. g of N in 5.57 x 102 molecules of N204 c. g of H in 1 molecule of H2 d. moles of aluminum sulphide in 228.9 g of aluminum sulphide e. molecules of C02 in a sample of C02 that contains 12.4 g of O 7. If a computer can do 1.00 x 106 calculations in 1.00 s, how many years will it take one billion computers to do 1.00 moles of calculations? 1 year = 365.25 days 8. If you had one mole of pennies to divide among all the people in the world, how many dollars would each person receive? Use 5 thousand million as the population of the earth, (use 3 sigfigs for your answer) 9. The most delicate balance can detect a mass of about 10-8 g. How many gold atoms would be in a sample having this mass? (use 3 sigfigs for your answer) 10. How many moles of iron (III) chloride could be made with 1.81 x 10 atoms of chlorine and the appropriate number of iron atoms#®;* • 106 Answers: Remember, you must show all of your work. These answers are here to ensure you are doing the work correctly! 1. a. b. c. d. Calculate the molar mass of each of the following compounds? e. 110.7g 174.3g i. 187.0g j. 123.5g f. 136. lg 98.Og g. 151.9g 53.5g k. 76.Og 164.0g h. 399.9g l. 342.3g 2. What is the mass of one mole of each of the following compounds? c. 84.Og a. 143.4g b. 140.3g d. 154.Og 3. Determine the number of moles in: d. 4.04 mol A1 a. 0.461 mol Cu b. 6.03 mol Pb e. 0.00172 mol Hg c. 1.09 mol . P2O5 f. 0.0245 mol 02 4. a. b. c. How many grams are there in: d. 58.7gAu 174.4gZn e. 1930gFe 1.59 x 104g Li 886g Cr203 f. 2.79 x 104g 02 5. How many atoms are there in: a. 2.60 x 1024 atoms Ag b. 3.08 x 1016 atoms Co c. 1.83 x 1026 atoms 6. a. b. c. d. e. d. 1.66 x 23 atoms Na e. 5.94 xlO24 atoms K f. 1.749 x 1036 atoms O How many: 3.66 x 1023 atoms Cl 25.9gN 3 x 10-24g H 1.522 mol A12S3 2.33 x 1023 molecules C02 7. 19.1 years 8. $1.20 x 1012/person 9. 3.06 x 1013 atoms Au 10. 0.100 mol FeCl3 -- - - *- jiAs'vl '