CH-2076

Percentage yield and purity

Chemistry · Secondary 4 · Hard · Percentage yield and purity

A sample of magnesium carbonate,

\text{MgCO}_3

, is heated strongly until it decomposes completely to magnesium oxide and carbon dioxide. 4.20 g of

\text{MgCO}_3

produces 2.02 g of

\text{MgO}

[M_r: \text{MgCO}_3 = 84, \text{MgO} = 40]

What is the percentage yield of magnesium oxide?

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