Question

How many moles of MgS203 are in 245 g of the compound

Answer 1

use the formula: \(moles=\dfrac{mass~(in~g)}{Molar~mass~(in~g/mol)}\)

But first, you need to calculate the molar mass of the compound by adding the molar masses of the individual elements that make it up (these are on the periodic table).