# Suppose 1.043 g of magnesium is heated in air. What is the theoretical amount of magnesium oxide that should be produced?

Nov 11, 2015

See explanation.

#### Explanation:

There reaction of burning magnesium is:

$2 M g \left(s\right) + {O}_{2} \left(g\right) \to 2 M g O \left(s\right)$

To calculate the amount of magnesium oxide that will be produced when $1.043 g$ are burnt:

?gMgO=underbrace(1.043cancel(color(blue)(gMg))xx(1cancel(color(red)(molMg)))/(24.31cancel(color(blue)(gMg))))_("convert g to mol")xxunderbrace((2cancel(color(green)(molMgO)))/(2cancel(color(red)(molMg))))_("Molar ratio")xxunderbrace((40.31gMgO)/(1cancel(color(green)(molMgO))))_("convert mol to g")=1.729gMgO