Molar Masses

Question 1

A gas cylinder contains exactly 1 mole of oxygen gas (O2). How many molecules of oxygen are in the cylinder?

Revolt · Accepted Answer

6.02 × 1023 molecules

Question 2

Potassium (K): g/mol

Revolt · Accepted Answer

Potassium (K):: 39.10; Osmium (Os):: 190.23; Manganese (Mn):: 54.94

Question 3

Osmium (Os): g/mol

Revolt · Accepted Answer

190.23

Question 4

Manganese (Mn): g/mol

Revolt · Accepted Answer

54.94

Question 5

Question 5

Revolt · Accepted Answer

17.04; 58.33; 159.70

Question 6

Ammonia (NH3): ✔ 17.0418.8118.04 g/mol

Revolt · Accepted Answer

17.04; 58.33; 159.70

Question 7

Use the periodic table to determine how many atoms of phosphorus (P) are in a sample that has a mass of 172.90 g.

Revolt · Accepted Answer

3.36 × 1024 atoms

Question 8

Question 10

Revolt · Accepted Answer

9.01 g; 0.276 g; 78,600 g

Question 9

Select the correct mass for each of the samples described below.3.01 × 1023 molecules H2O✔ 9.01 g18.02 g36.00 g

Revolt · Accepted Answer

✔ 9.01 g; 9.01 g; 0.276 g; 78,600 g

Question 10

8.32 × 1020 formula units CaBr2✔ 0.276 g199.88 g145,000 g

Revolt · Accepted Answer

✔ 0.276 g

Molar Masses Answers