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Two chemical reactions are shown:

2Mg + O2 → 2MgO
CaCO3 → CaO + CO2

Which statement is true?

(A) CaO is a reactant from second reaction
(B) Oxygent act as oksidator in the first reaction
(C) Magnesium undergoes reduction reaction
(D) Calsium carbonate act as product of the reaction

Respuesta :

Answer: B

Oxygen acts as oxidator in the first reaction.

Explanation:

At reactant side:

Mg = 0

At product side:

MgO = 0

but Oxygen (O) = -2

Mg + O = 0

Mg + (-2) = 0

Mg - 2 = 0

Mg = 2

Magnesium is oxidized by OXYGEN from zero to +2

Oxygen acts as oxidator in the first reaction.

Answer:

Oxygen acts as oxidator in the first reaction.

Explanation: