A sample of hydrated magnesium sulfate has a mass of 4.052 g. After it is heated, it has a mass of 1.979 g. What is the percentage by mass of water in the hydrate?

10.99%
20.73%
22.51%
51.16%

I dont understand how they get their results? Please help

Question

A sample of hydrated magnesium sulfate has a mass of 4.052 g. After it is heated, it has a mass of 1.979 g. What is the percentage by mass of water in the hydrate?

10.99%
20.73%
22.51%
51.16%

I dont understand how they get their results? Please help

anonymous · Answer

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