Question

1.5 moles of o2 combine with my to form oxide mgo the mass of my that has combined

Answer 1

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

2 moles of Mg combine with 1 mole of O2 gives 2 moles of MgO.

2 moles of Mg---------1 mole of O2
? moles ------------------1.5 moles of O2

=1.5×2/1
=3 moles

Therefore,3 moles of Mg combine with 1.5 moles of O2.

1 mole of Mg=24 g
3 moles of Mg=3(24)
=72 g

Answer is 72 g

Answer 2

here is the answer...72 g....hope it helps