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An 8.10-g sample of hydrated magnesium carbonate is heated. It has a mass of 4.94 g after heating. What is the percentage by mass of water in the hydrate? 3.16% 17.6% 39.0% 61.0…

An 8.10-g sample of hydrated magnesium carbonate is heated. It has a mass of 4.94 g after heating. What is the percentage by mass of water in the hydrate? 3.16% 17.6% 39.0% 61.0…
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An 8.10-g sample of hydrated magnesium carbonate is heated. It has a mass of 4.94 g after heating. What is the percentage by mass of water in the hydrate?

3.16%
17.6%
39.0%
61.0%

asked
User Ken Shiro
by
8.1k points

2 Answers

1 vote

C or 3rd option: 39.0%

answered
User JSEvgeny
by
8.5k points
2 votes
8.10-4.94=3.16=mass of water
3.16/8.10 X 100 = 39.0%
answered
User NathanBrakk
by
8.2k points
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