Answer to Question #113912 in General Chemistry for mrs

Question

Calculate amount (in mol) of magnesium and oxygen

Answer 1

Magnesium reacts with oxygen to produce magnesium oxide:

2Mg(s) + O₂(g) ----> 2MgO(s)

Number of moles of Mg = mass(Mg) / Mr(Mg) = mass(Mg) / 24.3

Number of moles of O₂ = mass(O₂) / Mr(O₂) = mass(O₂) / 32.0