CH-1880
Percentage yield and purity
Chemistry · Secondary 4 · Easy · Percentage yield and purity
A student wants to determine the percentage by mass of water in hydrated magnesium sulfate crystals. She heats 5.00 g of the crystals strongly until the mass becomes constant at 2.90 g. What is the percentage by mass of water in the crystals?
- 36.0%
- 42.0%
- 58.0%
- 2.10%
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