Answers2003350 Chemistry HONORS Sem 1 - MarezPercent Composition and Molecular Formula

Percent Composition and Molecular Formula Answers

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1
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Sodium carbonate decahydrate, Na2CO3 • 10H2O% by mass H2O

Answer:

63.0

2
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A compound is found to contain 50.05% sulfur and 49.95% oxygen by mass. What is the empirical formula for this compound?

A
SO
B
S2O
C
SO2
D
S2O3
3

Calculate the formula for the following hydrate composed of 76.9% CaSO3 and 23.1% H2O.

A
CaSO3 • H2O
B
CaSO3 • 2H2O
C
CaSO3 • 3H2O
D
CaSO3 • 4H2O

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