The hydrogen gas collected also contains some water vapor. The pressure of this mixture of gases equals the room pressure. find the partial pressure of H2 gas.

Answer 1

To find the partial pressure of H2 gas in the mixture, we need to use Dalton's law of partial pressures. Dalton's law states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the individual gases in the mixture.

P_total = P_H2 + P_H2O

We are given that the total pressure of the mixture (P_total) is equal to the room pressure, but we don't have the value for the room pressure or the pressure of water vapor (P_H2O). With the information provided, we cannot directly calculate the partial pressure of H2 gas.

However, if we are given the room pressure and the pressure of water vapor, we can use Dalton's law to find the partial pressure of H2 gas. Here's how to do it:

1. Find the total pressure of the mixture.
This is given as the room pressure. Let's assume it's P_total = 760 mmHg (standard atmospheric pressure).

2. Find the pressure of water vapor in the mixture.
This information needs to be provided. Let's assume the pressure of water vapor is P_H2O = 10 mmHg.

3. Use Dalton's law to find the partial pressure of H2 gas.
P_H2 = P_total - P_H2O = 760 mmHg - 10 mmHg = 750 mmHg

So, the partial pressure of H2 gas in the mixture would be 750 mmHg. Again, this is just an example, and you would need the actual values for room pressure and water vapor pressure to find the partial pressure of H2 gas.