J.R. S. answered 10/09/21
Ph.D. in Biochemistry with an emphasis in Neurochemistry/Neuropharm
2 Hg (l) + O2 (g) → Hg2O2 (s) YES
C2H4 (g) + 2 O2 (g) → 2 CO2 (g) + 2 H2O (l) NO
SHOULD BE C2H4 (g) + 3 O2 (g) → 2 CO2 (g) + 2 H2O (l)
Mg(NO3)2 (s) + 2 Li (s) → Mg (s) + 2 LiNO3 (s) YES
H2 (g) + O2 (g) → H2O (l) NO
SHOULD BE 2H2 (g) + O2 (g) → 2H2O (l)