How many moles are in 15 grams of cr2(co3)3 ?

There are 0.0528 moles of Chromium Carbonate (III) in 15 grams. See the explanation below, please.

Explanation:

We calculate the weight of 1 mol of compound having the atomic weights of each element.

Weight Cr = 51, 9961 g  Weight 0 = 15, 999 Weight C =12, 0107

Weight of 1 mol of Cr2 (C03)3 =51, 9961 x2 + 3 x (12, 0107 + 15, 999x 3)=

284, 0342 g

284, 0342 g 1 mol of Cr2 (C03)3

15 g                X = (15g x 1 mol)/284, 0342 g = 0, 0528 mol

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.