Question

What mass of oxygen is required to produce 8.0g of magnesium oxide from 4.8g if magnesium

Answer 1

3.2
hope this is super helpful but always remember to check your notes

Answer 2

Answer:-

3.2 grams

Explanation:-

The chemical formula for Magnesium Oxide is MgO.

The balanced chemical equation for this reaction is

2Mg + O2 --> 2MgO

Atomic weight of Mg = 24 grams

Molecular weight of oxygen gas O2 = 16 x 2 = 32 grams.

Molecular weight of MgO = 24 x 1 + 16 x 1 = 40 grams

From the balanced chemical equation we see

To produce 2 MgO we require 1 O2.

∴ To produce 2 x 40 grams of MgO we require 32 grams of Oxygen.

To produce 8 grams of MgO we require 32 x 8 / ( 2 x 40) grams of oxygen

= 3.2 grams of oxygen