Question

Определите, в каком мольном соотношении реагируют: а) углерод и кислород б) кальций и кислород в) литий и кислород

Answer 1

Ответ:

Объяснение:

a) C + O₂ = CO₂   1:1

   2C + O₂ = 2CO  2:1

б) 2Ca + O₂ = 2CaO  2:1

в) 4Li + O₂ = 2Li₂O  4:1

Answer 2

Molar Ratios of Reactants in Chemical Reactions

In chemical reactions, the molar ratio of reactants refers to the proportional relationship between the amounts of substances involved in a chemical reaction. Let's determine the molar ratios for the given reactants:

a) Carbon and Oxygen: The molar ratio of carbon and oxygen in a chemical reaction depends on the specific compound being formed. For example, in the combustion of carbon to form carbon dioxide (CO2), the molar ratio is 1:1. This means one mole of carbon reacts with one mole of oxygen to produce one mole of carbon dioxide.

b) Calcium and Oxygen: When calcium reacts with oxygen, the molar ratio is 2:1. This means two moles of calcium react with one mole of oxygen to form calcium oxide (CaO).

c) Lithium and Oxygen: The molar ratio of lithium and oxygen in a chemical reaction is 4:1. This means four moles of lithium react with one mole of oxygen to produce lithium oxide (Li2O).

These molar ratios are based on the stoichiometry of the chemical reactions involving the respective elements and are fundamental to understanding and predicting the outcomes of chemical reactions.