What mass of water is found in one mole of magnesium sulfate heptahydrate?

Question

Quizplus · Accepted Answer

The molar mass of magnesium sulfate heptahydrate MgSO4·7H2O is:

24.31 g/mol (Mg) + 32.06 g/mol (S) + 4x16.00 g/mol (O) + 7x18.02 g/mol (H2O) = 246.47 g/mol

The mass of 7 moles of water present in 1 mole of MgSO4.7H2O is:

7 moles x 18.02 g/mol = 126.14 g

Therefore, the mass of water found in one mole of magnesium sulfate heptahydrate is 126.14 g. Choice C is correct.

What Mass of Water Is Found in One Mole of Magnesium