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Calculations involving masses

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Question 21

Calculate the percentage by mass of potassium in potassium sulfate, K2SO4\text{K}_2\text{SO}_4K2​SO4​.

percentage by mass of element=total relative atomic mass of elementrelative formula mass of compound×100 \text{percentage by mass of element} = \frac{\text{total relative atomic mass of element}}{\text{relative formula mass of compound}} \times 100 percentage by mass of element=relative formula mass of compoundtotal relative atomic mass of element​×100

(relative atomic masses: O=16\text{O} = 16O=16, S=32\text{S} = 32S=32, K=39\text{K} = 39K=39)

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Calculations involving masses Questions

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