Composition of H2 gas in flask B after opening the valve

To determine the composition of H2 gas in flask B after opening the valve, we need to consider the initial conditions of both flasks and the behavior of the gases when they mix.

Given:
- Flask A volume: 10 litres
- Flask A contains 20 grams of H2 gas
- Flask B volume: 10 litres
- Flask B contains 88 grams of CO2 gas

Step 1: Calculate the moles of H2 and CO2 in each flask
- Use the ideal gas equation: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.
- Rearrange the equation to solve for n: n = PV/RT

For H2 gas in Flask A:
- We know the volume is 10 liters and the gas constant is constant for all gases.
- Assuming the temperature is constant, we can calculate the number of moles of H2: n(H2) = (P(A) * V(A)) / R * T

For CO2 gas in Flask B:
- Similarly, we can calculate the number of moles of CO2: n(CO2) = (P(B) * V(B)) / R * T

Step 2: Determine the total moles of gas after opening the valve
- When the valve connecting the two flasks is opened, the gases mix and reach equilibrium.
- The total moles of gas after mixing is the sum of the moles of H2 and CO2: n(total) = n(H2) + n(CO2)

Step 3: Calculate the composition of H2 gas in Flask B
- The composition of H2 gas in Flask B can be determined by dividing the moles of H2 in Flask B by the total moles of gas after mixing.

Composition of H2 gas in Flask B = n(H2 in Flask B) / n(total)

Step 4: Calculate the moles of H2 in Flask B
- We know the mass of H2 in Flask B and the molar mass of H2.
- Use the formula: Moles = mass / molar mass
- Calculate the moles of H2 in Flask B

Step 5: Substitute the values into the formula
- Substitute the calculated moles of H2 in Flask B and the total moles of gas into the composition formula to determine the composition of H2 gas in Flask B.

Step 6: Calculate the composition as a percentage
- Multiply the composition value by 100 to determine the percentage composition of H2 gas in Flask B.

By following these steps, we can determine the composition of H2 gas in Flask B after opening the valve.