How many moles of magnesium are needed to react with 16 grams of O2 in the productin of magnesium oxide?

Question

deals with stoichiometry and conversions of grams to mols.

Answer 1

first u have to write the balanced equation.

2Mg + O2 --> 2MgO

now change 16 grams of O2 to moles. 16/32=0.5.

now use the formula moles/coefficient=moles/coefficient to get moles of Mg.

0.5/1 = x/2
x=1mole of Mg