Question

A 1-g sample of the compound hydrogen chloride was analyzed and found to be 2.74 percent hydrogen and 97.3 percent chlorine. What percentage of hydrogen is present in a 2-g sample of hydrogen chloride?

Answer 1

2.74 percent hydrogen and 97.3 percent chlorine are in 2 g of compound.

The same as initial

Step-by-step explanation:

HCl → H⁺ + Cl⁻

2.74% H means that in 100 g of compund, 2.74 grams are H

97.3 % Cl means that in 100 g of compound, 97.3 grams are Cl

So how many grams of H and Cl, are in 1 g of compound

100 g ___ 2.74 g are H _____ 97.3 g are Cl

1g _____ 2.74/100 ____ 97.3/100

0.0274 g are H

0.973 g are Cl

In 2 grams we will find

0.0274 g .2 = 0.0548 g of H

0.973 g .2 = 1.946 g of Cl

(grams / total grams) . 100 = %

(0.0548/2 ) .100 = 2.74%

(1.946 /2) .100 = 97.3%