What is the mass of 3.61 moles of Ca?

Well, darling, the molar mass of calcium (Ca) is approximately 40.08 g/mol. So, if you have 3.61 moles of Ca, you just need to multiply the molar mass by the number of moles to find the mass. In this case, 3.61 moles of Ca would have a mass of around 144.88 grams. Hope that clears things up for you, sugar!