Question

A sample gas weights 8.0 g and has a volume of 6 dm³ at r.t.p


a)How many moles of gas are present in the sample?

b)What is the relative molecular mass of the gas?

c)Calculate the percentage by mass of iron in iron(iii) oxide

Answer 1

Answer:

(a) 3 holes are there

(b)relative molecular mass is 4

(c)mass of iron is 444.5