Question

The compound mgso4, epsom salts, is used to soothe sore feet and muscles. how many grams will you need to prepare a bath containing 5.40 mol of epsom salts?

Answer 1

Answer: Mass= n x molar mass= 4.00 moles x 120.4 g/mol = 482 g

Step-by-step explanation:

number of moles = mass/ molar mass

Answer 2

648 grams of epsom salt will be needed.

Step-by-step explanation:

Mass of magnesium atom = 24 g/mol

Mass of sulfur atom= 32 g/mol

Mass of oxygen atom= 16 g/mol

Molar mass of epsom salt:
`24 g/mol+32 g/mol+4* 16 g/mol=120 g/mol`

Moles of epsom salt in water = 5.40 mol

Mass of 5.40 moles of epsom salt : Molar mass × Moles:

=
`120 g/mol* 5.40 mol=648 g`

648 grams of epsom salt will be needed.