Analyse the position of the fractions in the column and relate this to the temperature of their boiling ranges and the length of their carbon chains. 

The answer will be c

Answer the molar mass of magnesium is 24.305g/mol.

Answer is: hydrogen is being oxidized.chemical reaction: co₂ + h₂ → co + h₂o.oxidation half reaction: h₂ → 2h⁺ + 2e⁻.reduction half reaction: c⁺⁴ + 2e⁻ → c⁺².oxidation is increase of oxidation number, hydrogen change oxidation number from neutral charge (in molecule of hydrogen) to oxidation number +1 (in water).

Ive had this before. your answer would be d. hope this ya