how many moles are in 9.8 grams of calcium?
when the number of moles Ca = mass of Ca / molar mass of Ca. and we can get the molar mass of Ca, it is = 40 g/mol and we have already the mass of Ca (given) = 9.8 g so, by substitution: the moles Ca = 9.8 g / 40 g/mol = 0.245 moles
Answer: 0.24 moles
Explanation: