Homework Help: Chemistry

Posted by Argenta on Friday, July 2, 2010 at 9:57pm.

Elements A and B form two new compounds. In compound I, 2 grams of A is combined with 4 grams of B. In compound II, 4 grams of A is combined with 12 grams of B. If the formula of compound I is A₂B, what is the formula of compound II?

Chemistry - drwls, Saturday, July 3, 2010 at 5:23am
They tell you that compound A2B has twice the mass of B as A. That requires that element A have 1/4 the mass of B.

For a compound to have three times more B than A (my mass), the formula must be A4B3, or (A4B3)n, where n is an integer

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