Question

027/45 Mass of magnesium in gm which will
completely combine with one mole of oxygen is
(Atomic mass of Mg = 24)​

Answer 1

Step-by-step explanation:

ANSWER

2Mg+O2→2MgO

1 mole of O2 combines with 2 moles of  Mg.

1.5 mole of O2 will combine with 1.5×2=3 moles of Mg.

Atomic mass of Mg=24 g/mol

Mass of Mg=3 mol×24 g/mol=72 g

Hence, 1.5 mole of O2 will combine with 72 grams of  Mg.

Answer 2

Step-by-step explanation:

2Mg+O2 -------> 2 MgO

As with one mole of Oxygen gas

we need 2 moles of Mg

means

2×24 = 48 g of Mg