Final answer:
The molar mass of Cr3(AsO4)2 is found by adding the molar masses of chromium, arsenic, and oxygen, which results in a total of 433.8267 g/mol.
Step-by-step explanation:
The molar mass of Cr3(AsO4)2 is calculated by adding the molar masses of all the atoms in the formula. The molar mass of each atom is: Cr (Chromium) = 51.9961 g/mol, As (Arsenic) = 74.9216 g/mol, and O (Oxygen) = 15.9994 g/mol. The formula has 3 chromium atoms, 2 arsenic atoms, and 8 oxygen atoms.
To find the molar mass of Cr3(AsO4)2, we multiply the molar mass of each atom by the number of times it appears in the formula and add them together:
- (3 Cr atoms) × (51.9961 g/mol) = 155.9883 g
- (2 As atoms) × (74.9216 g/mol) = 149.8432 g
- (8 O atoms) × (15.9994 g/mol) = 127.9952 g
Adding these together gives:
155.9883 g + 149.8432 g + 127.9952 g = 433.8267 g/mol
The molar mass of Cr3(AsO4)2 is 433.8267 g/mol.