What are the names and formula masses of MgSO4,MgSO4.7H20, and (NH4)2SO4. Please help
magnesium sulfate
magnesium sulfate heptahydrate
ammonium sulfate.
Just type in the formula at this site to obtain molar masses. http://environmentalchemistry.com/yogi/reference/molar.html
To find the names and formula masses of MgSO4, MgSO4·7H2O, and (NH4)2SO4, we'll break down the compounds step by step:
1. MgSO4:
- The name of this compound is magnesium sulfate.
- To calculate its formula mass, first find the atomic masses of each element involved:
- Mg (magnesium) has a mass of 24.31 g/mol.
- S (sulfur) has a mass of 32.07 g/mol.
- O (oxygen) has a mass of 16.00 g/mol.
- Since magnesium sulfate contains one magnesium atom (Mg), one sulfur atom (S), and four oxygen atoms (O), we can add up the atomic masses:
- (1 × 24.31 g/mol) + (1 × 32.07 g/mol) + (4 × 16.00 g/mol) = 120.37 g/mol.
- Therefore, the formula mass of MgSO4 is 120.37 g/mol.
2. MgSO4·7H2O:
- The name of this compound is magnesium sulfate heptahydrate.
- To calculate its formula mass, we need to account for the water molecules (H2O) attached to the magnesium sulfate.
- We already know the formula mass of MgSO4 is 120.37 g/mol.
- The formula mass of water (H2O) is (2 × 1.01 g/mol) + (1 × 16.00 g/mol) = 18.02 g/mol.
- Since there are 7 water molecules, multiply the formula mass of water by 7 and add it to the formula mass of MgSO4:
- (7 × 18.02 g/mol) + 120.37 g/mol = 246.48 g/mol.
- Therefore, the formula mass of MgSO4·7H2O is 246.48 g/mol.
3. (NH4)2SO4:
- The name of this compound is ammonium sulfate.
- To calculate its formula mass, we need to account for the elements involved:
- N (nitrogen) has a mass of 14.01 g/mol.
- H (hydrogen) has a mass of 1.01 g/mol.
- S (sulfur) has a mass of 32.07 g/mol.
- O (oxygen) has a mass of 16.00 g/mol.
- Since ammonium sulfate contains two ammonium ions [(NH4)2] and one sulfate ion (SO4), we can add up the atomic masses:
- (2 × (1 × 14.01 g/mol + 4 × 1.01 g/mol)) + (1 × 32.07 g/mol + 4 × 16.00 g/mol) = 132.14 g/mol.
- Therefore, the formula mass of (NH4)2SO4 is 132.14 g/mol.
To summarize:
- The name and formula mass of MgSO4 are magnesium sulfate and 120.37 g/mol.
- The name and formula mass of MgSO4·7H2O are magnesium sulfate heptahydrate and 246.48 g/mol.
- The name and formula mass of (NH4)2SO4 are ammonium sulfate and 132.14 g/mol.