Respuesta :
Atomic mass Ca = 40.0 u.m.a
1 mole Ca ------------- 40.0
? moles Ca ---------- 15 g
15 x 1 / 40 = 0.375 moles of Ca
1 mole Ca ------------- 40.0
? moles Ca ---------- 15 g
15 x 1 / 40 = 0.375 moles of Ca