Answer:
This is an oxidation-reduction (redox) reaction:
2 Ni0 - 4 e- → 2 NiII
(oxidation)
2 O0 + 4 e- → 2 O-II
(reduction)
Ni is a reducing agent, O2 is an oxidizing agent.
Answer:
c turns back when iodine is added result indicated a chemical reaction
Mass number- number of neutrons= number of protons.
52-27=25 protons.
Number of protons = atomic number =25
It is Mn (manganese).
Answer:number 2
Explanation:
the definition of photosynthesis is that carbon dioxide and water changes into sugar and oxygen
Answer:
a) H2S:SO2 = 2:2 and O2:H2O = 3:2
Explanation:
⇒ H2S:SO2 = 2 mol H2S / 2 mol SO2 ≡ 2 : 2
⇒ O2:H2O = 3 mol O2 / 2 mol H2O ≡ 3 : 2
