10 ml chlorine gas reacts with 25ml of oxygen gas completely to form 10 ml of gaseous compound. What is the molecular formula of the compound formed?

1.Cl2O

2.Cl2O7

3.ClO2

4.Cl2O5

To determine the molecular formula of the compound formed when chlorine gas reacts with oxygen gas, we need to analyze the reaction and the volumes of the gases involved. The reaction between chlorine (Cl₂) and oxygen (O₂) can produce several different compounds, but we will focus on the information given in your question.

Understanding the Reaction

In this scenario, we have 10 ml of chlorine gas reacting with 25 ml of oxygen gas. According to the stoichiometry of gas reactions, we can use the volumes of the gases to infer the mole ratios, as gases at the same temperature and pressure occupy volumes that are proportional to the number of moles.

Volume Ratios

The reaction can be simplified to a ratio of the reactants. Chlorine gas (Cl₂) and oxygen gas (O₂) react in a specific ratio to form a compound. The balanced chemical equation for the reaction of chlorine with oxygen to form dichlorine monoxide (Cl₂O) is:

• 2 Cl₂ + O₂ → 2 Cl₂O

From this equation, we can see that 2 volumes of Cl₂ react with 1 volume of O₂ to produce 2 volumes of Cl₂O. This means that for every 2 volumes of chlorine, we need 1 volume of oxygen.

Calculating the Reaction

In your case, we have:

• 10 ml of Cl₂
• 25 ml of O₂

To find out how much Cl₂O can be formed, we first need to determine the limiting reactant. According to the stoichiometry, 10 ml of Cl₂ would require:

• 10 ml Cl₂ × (1 ml O₂ / 2 ml Cl₂) = 5 ml O₂

Since we have 25 ml of O₂ available, chlorine is the limiting reactant. Therefore, all of the chlorine will react, and we can calculate the volume of Cl₂O produced:

• 10 ml Cl₂ will produce 10 ml of Cl₂O (since the ratio is 1:1 in the balanced equation).

Identifying the Compound

Now that we know the reaction produces 10 ml of Cl₂O, we can identify the molecular formula of the compound formed. The compound formed is dichlorine monoxide, which has the molecular formula Cl₂O.

Final Answer

Based on the options provided, the correct molecular formula of the compound formed is:

• 1. Cl₂O

In summary, the reaction of chlorine gas with oxygen gas in the given volumes leads to the formation of dichlorine monoxide, represented by the molecular formula Cl₂O.