2. Molar & atomic Mass Mole  > particles Mass  > Mole Molar Volume of Gas Gas Density 10 20 30 40 50

3. Question 1 - 10 What is the molar mass of O?

4. Answer 1 – 10 16 g

5. Question 1 - 20 What is the atomic mass of CH 4?

6. Answer 1 – 20 16 amu

7. Question 1 - 30 What is the atomic mass of HCO 3 - ?

8. Answer 1 – 30 61 amu

9. Question 1 - 40 What is the molar mass of H 2 SO 4 ?

10. Answer 1 – 40 98.1 g

11. Question 1 - 50 What is the molar mass of Fe(OH) 3 )?

12. Answer 1 – 50 158.7 g

13. Question 2 - 10 How many moles in 6.02 x 10 23 particles of N 2 ?

14. Answer 2 – 10 1 mole

15. Question 2 - 20 Find the number of atoms in 3.0 moles of P.

16. Answer 2 – 20 1.8 x 10 24 atoms

17. Question 2 - 30 Find the number of ions in 4.56 moles of Cl -.

18. Answer 2 – 30 2.75 x 10 24

19. Question 2 - 40 Find the number of moles in 9.50 x 10 24 atoms of Pb

20. Answer 2 – 40 15.8 moles

21. Question 2 - 50 Find the number of moles in 8.12 x 10 22 molecules of C 2 H 6

22. Answer 2 – 50 0.135 moles

23. Question 3 - 10 What is the mass of one mole of PCl 3 ?

24. Answer 3 – 10 137.3 g

25. Question 3 - 20 What is the mass of 7.1 mole of O 2 ?

26. Answer 3 – 20 227 g

27. Question 3 - 30 How many moles in 90.2 g of H 2 O?

28. Answer 3 – 30 5.01 moles

29. Question 3 - 40 How many grams in 0.015 moles of H 2 O 2 ?

30. Answer 3 – 40 0.51 grams

31. Question 3 - 50 How many moles in 892 g of Fe(OH) 2 ?

32. Answer 3 – 50 9.94 moles

33. Question 4 - 10 What is standard temperature and pressure?

34. Answer 4 – 10 0 Celcius 1 atm

35. Question 4 - 20 What is the volume of a 1 mole of CO 2 at STP?

36. Answer 4 – 20 22.4 L

37. Question 4 - 30 What is the volume of 2.10 moles of a H 2 at STP?

38. Answer 4 – 30 47.0 L

39. Question 4 - 40 How many moles are there in 892 L of Helium at STP?

40. Answer 4 – 40 39.8 moles

41. Question 4 - 50 How many moles in 20.6 L of Ar at STP?

42. Answer 4 – 50 0.920 moles

43. Question 5 - 10 The density of a gas at STP is 6.7 g/L. What is its molar mass?

44. Answer 5 – 10 150 g/mol

45. Question 5 - 20 The density of a gas at STP is 7.8 g/L. What is its molar mass?

46. Answer 5 – 20 170 g/mol

47. Question 5 - 30 The density of a gas at STP is 0.168 g/L. What is its molar mass?

48. Answer 5 – 30 3.76 g/mol

49. Question 5 - 40 The density of a gas at STP is 24.5 g/L. What is its molar mass?

50. Answer 5 – 40 549 g/mol

51. Question 5 - 50 The density of a gas at STP is 89.2 g/L. What is its molar mass?

52. Answer 5 – 50 2000 g/mol OR 2.00 x 10 3 g/mol