Chemistry question I need help

Question

How many moles of tin are in a pure tin cup with a mass of 35.6 grams?

Answer 1

To find the number of moles in a pure tin cup with a mass of 35.6 grams, you need the molar mass of Sn. which is 118.71 g/mol.

Then, you set up your equation and round to 3 significant figures. 35.6 g/118.71 g/mol=0.300 mol Sn