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Answer :
The percent oxygen in limestone is 48% and the percent carbon is 12%.
To find the percent oxygen and carbon in limestone, we need to use the formula:
% element = (mass of element / total mass of compound) x 100%
First, we need to calculate the mass of calcium in the sample:
Mass of calcium = total mass of compound - mass of oxygen - mass of carbon
Mass of calcium = 3.75 g - 1.80 g - 0.450 g
Mass of calcium = 2.52 g
Now we can calculate the percent oxygen:
% O = (1.80 g / 3.75 g) x 100%
% O = 48%
And the percent carbon:
% C = (0.450 g / 3.75 g) x 100%
% C = 12%
Therefore, the percent oxygen in limestone is 48% and the percent carbon is 12%.
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