Question

if 3.15g of mercury are thermally decomposed to mercury and oxygen what mass of mercury will be produced and how many oxygen molecules will be produced [hg=208,o=16]

Answer 1

2HgO ==> 2Hg + O2
mols HgO = grams/molar mass = ?
Using the coefficients in the balanced equation, convert mols HgO to mols Hg. That will be mols Hg = mols HgO x (2 mols Hg/2 mols HgO) = mols HgO x 2/2 = ?
Then grams Hg = mols Hg x atomic mass Hg = ?

Do the same for O2 to find mols O2. Convert to molecules O2 knowing that 1 mol O2 contains 6.02E23 molecules.

Answer 2

(hg =208,0=16

Answer 3

Thanks