Find the percentage composition of calcium in the following compound, round to the nearest hundredth of a percent.
calcium phosphate, Ca3(PO4)2
(2 points)
To determine the percentage composition of calcium in calcium phosphate, we first need to find the molar mass of the compound.
The molar mass of calcium phosphate is calculated as follows:
3(Ca) + 2(P) + 8(O)
= 3(40.08) + 2(30.97) + 8(16.00)
= 120.24 + 61.94 + 128.00
= 310.18 g/mol
Next, we determine the molar mass of calcium in calcium phosphate:
40.08 g/mol
To find the percentage composition of calcium in calcium phosphate, we divide the molar mass of calcium by the molar mass of the compound and multiply by 100:
(40.08 g/mol / 310.18 g/mol) x 100 = 12.92%
Therefore, the percentage composition of calcium in calcium phosphate is approximately 12.92%.