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1 February, 01:43

1. A mixture is found to contain 0.69 g SiO2, 1.05 g of cellulose, and 2.17 g of calcium carbonate. What is the mass percentage of SiO2 in this mixture?

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  1. 1 February, 01:49
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    Mass percentage is another way of expressing concentration of a substance in a mixture. Mass percentage is calculated as the mass of a component divided by the total mass of the mixture, multiplied by 100%. It is calculated as follows:

    % SiO2 = (0.69 g SiO2 / (0.69 g SiO2 + 1.05 g of cellulose + 2.17 g of calcium carbonate)) x 100% = 17.65% SiO2
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