Final answer:
To calculate the number of moles of CuSO4·5H2O, find the molar mass of the compound, then divide the sample mass by this molar mass. The calculation follows the formula: Number of moles = Mass of sample (g) / Molar mass (g/mol).
Step-by-step explanation:
To calculate the number of moles of CuSO4·5H2O, you first need to ascertain the molar mass of this compound. The molar mass is the sum of the atomic masses of each element in the compound, including the water molecules (5 moles of H2O).
The molar mass of CuSO4·5H2O is calculated from the molar masses of Cu (63.55 g/mol), S (32.07 g/mol), O (16.00 g/mol), and H (1.008 g/mol). After finding the molar mass, you divide the mass of the sample by the molar mass to find the number of moles.
For a sample of 5.00 g of CuSO4·5H2O:
- Calculate the molar mass: (63.55 + 32.07 + 4×16.00) + (5×2×1.008 + 5×16.00) g/mol.
- Divide the given mass by the molar mass to find the number of moles: Number of moles = Mass of sample (g) / Molar mass (g/mol).
This process uses the molar mass as a conversion factor between the mass of a substance and the amount of substance in moles.
The provided information appears incorrect as it pertains to copper (II) hydroxide, not CuSO4·5H2O, but the calculation method would remain the same with the correct molar mass.