Ineed studying for an flvs chemistry dba..who can me ?
an example question : ( look at the picture )
describe how you got the answer and fill it in.

What diagram shows the ionic compound of magnesium oxide

There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both