A pure sample of compound X contains only carbon and oxygen in a mass ratio of 0.750 g C : 1.00 g O. An impure sample of compound X has a total mass of 75.00 g and is found to contain 25.00 g oxygen. Assuming that the contaminants do not contain oxygen, determine the mass of impurities within the impure sample of Compound X.

Question
Asked Oct 12, 2019
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A pure sample of compound X contains only carbon and oxygen in a mass ratio of 0.750 g C : 1.00 g O. An impure sample of compound X has a total mass of 75.00 g and is found to contain 25.00 g oxygen. Assuming that the contaminants do not contain oxygen, determine the mass of impurities within the impure sample of Compound X.

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Expert Answer

Step 1

A pure sample of compound X contains only carbon and oxygen in a mass ratio of 0.750 g C: 1.00 g O. An impure sample of compound X has a total mass of 75.00 g and is found to contain 25.00 g oxygen. Assuming that the contaminants do not contain oxygen, the mass of impurities within the impure sample of Compound X is to be determined.

Step 2

Let the total mass of the pure compound X be x.

Thus, mass of carbon in pure X = 0.750 x

And mass of oxygen in pure X = 1.00 x

Now, the 75.0 g of impure X has 25.00 g of oxygen and it is mentioned that impurities do not contain impurities.

Therefore, 1.00 x = 25.00

Solve for x.

1.00 x 25.00 g
25.00 g
X =
= 25.0 g
1.00
Total mass of pure sample of X 25.0 g
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1.00 x 25.00 g 25.00 g X = = 25.0 g 1.00 Total mass of pure sample of X 25.0 g

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Step 3

Calculate the mass of carbon and oxygen in pure sample-

Mass of carbon in pure X ...

Mass of carbon in pure X = 0.750 x25.0 18.75 g
And mass of oxygen in pure X = 1.00x25.0 25.0 g
help_outline

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Mass of carbon in pure X = 0.750 x25.0 18.75 g And mass of oxygen in pure X = 1.00x25.0 25.0 g

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