What is the molar mass of a particular compound if 0.089 mol weighs 6.86 g?

Answer 1

Well, since molar mass is defined as grams / moles, all we have to do is put the values in as follows:

6.86 g / 0.089 moles = 77.08 grams/mole = molar mass (actually is 77 g/mole to 2 sig. figs.)