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A sample of chemical X is found to contain 5.0 grams of oxygen, 10.0 grams of carbon, and 20.0 grams of nitrogen. The law of definite proportion would predict that a 61 gram sample of chemical X should contain how many grams of carbon?

Respuesta :

dsdrajlin

Answer:

18g C

Explanation:

A sample of chemical X is found to contain 5.0 grams of oxygen, 10.0 grams of carbon, and 20.0 grams of nitrogen. The mass of that sample is:

5.0 g + 10.0 g + 20.0 g = 35.0 g

The ratio mC/mX is:

[tex]\frac{mC}{mX} =\frac{10.0gC}{35.0gX} =\frac{0.29gC}{1gX}[/tex]

According to the law of definite proportion, this ratio is constant for the same chemical. For a sample of 61 g of X,

[tex]61gX.\frac{0.29gC}{1gX}=18gC[/tex]