How many moles of mgs2o3 are in 195g of the compound?

The amount of a substance can be converted into grams of that substance by using the molar mass. It is a physical property of a substance which describes the mass per mole of the substance. The molar mass of MgS2O3 is 136.4332 g/mol. Dividing the molar mass of MgS2O3 from the given amount will yield the moles of MgS2O3

195 g MgS2O3 / 136.4332 g/mol = 1.43 mol MgS2O3