Question

2mg(s)+o2(g)2mgo(s) calculate how much oxygen is required to combust 10 moles og mg from the given equation

Answer 1

♤The balanced equation is

2Mg(s)+O2(g)=>2MgO(s)

♤ from equation

2 mol of Mg are react with 1mol of O2

◇So

10 mol of Mg react with 5 mol of O2

♤the no.of molecules of O2 are

5× 6×10^23 molecule

●if u want to calculate masses

Mass of oxygen is

No.of moles × molecular mass

ms= n×Mwt

ms = 5 × 32 = 160g

Hope its helpful