# How do you convert 100 g of CuSO_4 * 3H_2O to moles?

May 6, 2018

$0.468 n$

#### Explanation:

$\text{number of moles"="mass"/"molar mass}$

the mass in this case: 100g

molar mass: (looking at the periodic table because molar mass means the total mass of the atomic mass of all your elements)
=63.55+32.07+16x4+3(1.008x2+16)
=213.668

Therefore, $\text{number of moles} = \frac{100}{213.668} = 0.468 n$