one sample of magnesium fluoride produced 1.65kg of magnesium and 2.58kg of fluorine. A second sample produced 1.31kg of magnesium. How much fluorine (in grams) did the second sample produce?

Answer 1

......MgF2 ==> Mg + F2
............. 1.65...2.58
..............1.31....x
So (1.65/1.31) = (2.58/x)
Solve for x.

Answer 2

1250