Which of the following gases can be used for storage of fresh sample of an oil for a long time? (A) Carbon dioxide or oxygen (B) Nitrogen or oxygen

(c) ozone and oxygen

The percentage of gases like oxygen, nitrogen and carbon dioxide remain almost the same in the atmosphere because cycling of these gases maintains consistency.

                            Carbon + Oxygen → Carbon dioxide  3g of carbon reacts with 8 g of oxygen to produce...

The law of conservation of mass states that mass can neither be created nor destroyed or mass of reactants is always equal to that of products.     C        + ...

(C) carbon dioxide only

(i) Nitrogen

Molecular mass of CO2 = 12 + 2 x 16 = 44  1mol of CO2 = 44 g  44 g of CO2 contain = 6.022 x 1023 molecules  88 g of CO2 contain...

(d) Acid rain is caused by a chemical reaction that begins when compounds of sulphur dioxide and nitrogen oxide react with molecules in the atmosphere to produce acids.

Calculation of mass of CO2 produced:  Mass of compound =0.20g  %C =12 x C  69=12*mass of CO2 formed*100/44*0.2  Mass of CO2 formed =69*44*.2/12*100  = 0.506g  Similarly, % H =2* mass of H2O formed*100/18*mass of compoun 4.8=2* mass...

(C) totally different from both carbon and oxygen