Miscellaneous Molar Mass Problems

1. Calculate the mass of 1.000 mole of CaCl₂

2. Calculate grams in 3.0000 moles of CO₂

3. Calculate number of moles in 32.0 g of CH₄

4. Determine mass in grams of 40.0 moles of Na₂CO₃

5. Calculate moles in 168.0 g of HgS

6. Calculate moles in 510.0 g of Al₂S₃

7. How many moles are in 27.00 g of H₂O

8. Determine the mass in grams of Avogadro number of C₁₂H₂₂O₁₁

9. Find mass in grams of 9.03 moles of H₂S

10. Determine grams in 1.204 mole of NH₃

Consider the molecule CuNH₄Cl₃ as you answer 11 - 19.

11. Name the elements present.

12. How many atoms form the molecule?

13. How many of each atom in the molecule?

14. How many hydrogen atoms in one mole of molecules?

15. How many chlorine atoms in six moles of molecules?

16. What is the molar mass of this molecule?

17. Name this molecule.

18. What is the mass in grams of one molecule?

19. How many moles would be in 6.84 g of this substance?

20. You need 0.0100 mole of lead (II) chromate. How much should you weigh on the scale?

21. Given 6.40 g of HBr. How many moles is this?

22. Write the correct formula for calcium acetate and then answer 23 - 25 based on it.

23. What is the mass of exactly one mole of calcium acetate?

24. How many moles are contained in 1.58 g of the substance in #23?

25. How much does 0.400 mole of #23 weigh?

26. Write the formula for oxygen gas.

27. How many atoms (and moles) are represented by the formula in #26?

28. What is the mass of Avogadro Number of oxygen molecules?