Question

Calculate how many grams of oxygen form when each quantity of reactant completely reacts.

2HgO----->2Hg+O2

Answer 1

a) 2.13 g Hgo
b) 6.77 g Hgo
c) 1.55 kg Hgo
d) 3.87 mg Hgo

Answer 2

HgO ******** on those

Answer 3

You're given a balanced equation
2 moles of HgO formes 1 mole of O2
so then take your masses for each one (first convert all to g) to moles of HgO = ? mass (use periodic table to find M.W. of HgO and convert to moles)
Afterwards stoichometry to find moles of O2 then mass of O2 using M.W. of O2