Question

The molecular mass of magnesium sulfate heptahydrate is 246.46 g/mol. What weight is needed to obtain 0.150 moles?

Answer 1

Answer : The mass of magnesium sulfate heptahydrate needed are, 36.969 grams.

Explanation : Given,

Moles of magnesium sulfate heptahydrate = 0.150 mole

Molar mass of magnesium sulfate heptahydrate = 246.46 g/mole

Formula used :

`\text{Mass of magnesium sulfate heptahydrate}=\text{Moles of magnesium sulfate heptahydrate}* {\text{Molar mass of magnesium sulfate heptahydrate}`

Now put all the given values in this formula, we get:

`\text{Mass of magnesium sulfate heptahydrate}=0.150mole* 246.46g/mole`

`\text{Mass of magnesium sulfate heptahydrate}=36.969g`

Therefore, the mass of magnesium sulfate heptahydrate needed are, 36.969 grams.