Molar & atomic Mass

Mole > particles

Mass > Mole

Molar Volume of

Gas

Gas Density

10 10 10 10 10

20 20 20 20 20

30 30 30 30 30

40 40 40 40 40

50 50 50 50 50

Question 1 - 10

What is the molar mass of O?

Answer 1 – 10

16 g

Question 1 - 20

What is the atomic mass of CH4?

Answer 1 – 20

16 amu

Question 1 - 30

What is the atomic mass of HCO3-?

Answer 1 – 30

61 amu

Question 1 - 40

What is the molar mass of H2SO4?

Answer 1 – 40

98.1 g

Question 1 - 50

What is the molar mass of Fe(OH)3)?

Answer 1 – 50

158.7 g

Question 2 - 10

How many moles in 6.02 x 1023

particles of N2?

Answer 2 – 10

1 mole

Question 2 - 20

Find the number of atoms in 3.0 moles of P.

Answer 2 – 20

1.8 x 1024 atoms

Question 2 - 30

Find the number of ions in 4.56 moles of Cl-.

Answer 2 – 30

2.75 x 1024

Question 2 - 40

Find the number of moles in 9.50 x 1024 atoms of Pb

Answer 2 – 40

15.8 moles

Question 2 - 50

Find the number of moles in 8.12 x 1022 molecules of C2H6

Answer 2 – 50

0.135 moles

Question 3 - 10

What is the mass of one mole of PCl3?

Answer 3 – 10

137.3 g

Question 3 - 20

What is the mass of 7.1 mole of O2?

Answer 3 – 20

227 g

Question 3 - 30

How many moles in 90.2 g of H2O?

Answer 3 – 30

5.01 moles

Question 3 - 40

How many grams in 0.015 moles of H2O2?

Answer 3 – 40

0.51 grams

Question 3 - 50

How many moles in 892 g of Fe(OH)2?

Answer 3 – 50

9.94 moles

Question 4 - 10

What is standard temperature and pressure?

Answer 4 – 10

•0 Celcius•1 atm

Question 4 - 20

•What is the volume of a 1 mole of CO2 at STP?

Answer 4 – 20

22.4 L

Question 4 - 30

What is the volume of 2.10 moles of a H2 at STP?

Answer 4 – 30

47.0 L

Question 4 - 40

How many moles are there in 892 L of Helium

at STP?

Answer 4 – 40

39.8 moles

Question 4 - 50

How many moles in 20.6 L of Ar at STP?

Answer 4 – 50

0.920 moles

Question 5 - 10

The density of a gas at STP is 6.7 g/L. What is its molar mass?

Answer 5 – 10

150 g/mol

Question 5 - 20

The density of a gas at STP is 7.8 g/L. What is its molar mass?

Answer 5 – 20

170 g/mol

Question 5 - 30

The density of a gas at STP is 0.168 g/L. What is its molar

mass?

Answer 5 – 30

3.76 g/mol

Question 5 - 40

The density of a gas at STP is 24.5 g/L. What is its molar

mass?

Answer 5 – 40

549 g/mol

Question 5 - 50

The density of a gas at STP is 89.2 g/L. What is its molar

mass?

Answer 5 – 50

2000 g/molOR

2.00 x 103 g/mol