Question

Upon decomposition, one sample of magnesium fluoride produced 1.66 kg of magnesium and 2.56 kg of fluorine. A second sample produced 1.25 kg of magnesium. How much fluorine (in grams) did the second sample produce?

Answer 1

2.97 grams of fluorine will produce

Answer 2

We can use the Law of constant proportions here.

The ratio of masses of magnesium to fluorine is constant. So,

$\frac{magnesium \: mass \: 1}{fluorine \: mass \: 1} = \frac{magnesium \: mass \: 2}{fluorine \: mass \: 2}$

So, Mass of fluorine 2=1.25×2.56÷1.66

=1.92gms

Ans: 1.92 gms