2Mg + O2 --> 2MgO?

Question

using the following equation 2Mg + O2 --> 2MgO how many grams of magnesium are requiared to produce 40.0 grams of magnesium oxide. round to one decimal place

Answer 1

2Mg + O2 --> 2MgO

Molar mass(mass of one mole) of MgO = 24+ 16 = 40 g

Number of moles of MgO in 40.0is 40.0 g/40 g = 1 mol

According to the balanced equation, 2 mol Mg produces 2 mol MgO; or 1 mol Mg produces 1 mol MgO

Molar mass of Mg = 24 g/mol

So Mass of Mg required to produce 40.0 g(1 mol) of MgO

= 1 mol * 24 g/mol = 24.0 g

Answer 2

Yes!