AnswersCR SS Chemistry S2 201819 2026Scientific Notation and Significant Figures

Molar Masses Answers

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

A
4.01 × 1022 molecules
B
6.02 × 1023 molecules
C
9.03 × 1024 molecules
D
2.89 × 1026 molecules
2
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Osmium (Os): g/mol

Answer:

190.23

3

Manganese (Mn): g/mol

Answer:

54.94

4

1.93 × 1026 molecules XeF6✔ 78,600 g0.77 g245.29 g

A
✔ 78,600 g
B
0.77 g
C
245.29 g

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