Calculations involving masses

Calculate the percentage by mass of potassium in potassium carbonate, $K2CO3\text{K}_2\text{CO}_3$ .

Give your answer to 1 decimal place.

(relative atomic masses: $K=39.0\text{K} = 39.0$ , $C=12.0\text{C} = 12.0$ , $O=16.0\text{O} = 16.0$ )

[3]

Calculate the percentage by mass of potassium in potassium carbonate, $K2CO3\text{K}_2\text{CO}_3$ .

Give your answer to 1 decimal place.

(relative atomic masses: $K=39.0\text{K} = 39.0$ , $C=12.0\text{C} = 12.0$ , $O=16.0\text{O} = 16.0$ )

[3]

Calculations involving masses Questions