How many grams of magnesium are needed to completely react with 2.00 mol of O2 in the synthesis reaction that produces magnesium oxide?

Question

asked Sep 12, 2021 120k views

1 Answer

Lucas Matos · Answer 1 · 2021-09-15T22:28:55+0000

97.22 grams of magnesium is needed.

Step-by-step explanation:

The molar ratio of Mg to O2 to make MgO is 2:1

Here, we have 2 moles of O2, therefore we need 4 moles of Mg.

1 mol of Mg = 24.305 g

Therefore

4 moles of Mg = 4
24.305 g

= 97.22 g

Hence we need 97.22grams of magnesium are needed to completely reactwith 2.00 mol of O2 in the synthesis reaction that producesmagnesium oxide.