Answer:
806 grams MgSO4 (epsom salt)
Step-by-step explanation:
Determine the chemical composition of epsom salt. It is magnesium sulfate: MgSO4. Determine the molar mass of epsom salt by adding the individual atomic masses of each element in the salt:
1 Mg = 24.3 AMU
1 S = 32 AMU
4 O = 64 AMU
Total = 120.36 AMU
This is also the number for molar mass, just expressed as grams/mole instead of AMU. The molar mass of MgSO4 is 120.36 grams/mole.
If we want 6.70 moles, we can multiply the molar mass by 6.70 moles:
(6.70 moles)*(120.4 grams/mole) = 806 grams MgSO4 (epsom salt)