Respuesta :

drpelezo

Answer:

80 grams MgO(s)

Explanation:

2Mg(s) + O₂(g) => 2MgO(s); formula wt MgO = 40 g/mole

2moles Mg(s) gives 2moles MgO(s) => 2moles(40 g/mole) = 80 grams MgO(s)