Question

How many moles of magnesium, Mg, are there in 4.75 grams of magnesium?

Please explain your answer, I am confused! Thank you!!

Answer 1

Molar mass Mg = 24.3 g/mol

1 mole mg ------------ 24.3 g
?? moles mg --------- 4.75 g

4.75 x 1 / 24.3 => 0.195 moles of Mg

hope this helps!