500 c.c. each of hydrogen at 700 mm Hg pressure and oxygen at 600 mm Hg pressure are put together in a vessel of 1 litre capacity. The final pressure of the gas mixture will be __________ mm Hg.

ANS:A - 650

To find the final pressure of the gas mixture, we can use Dalton's law of partial pressures, which states that the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of each individual gas. Given:

• Volume of the vessel = 1 liter = 1000 cc
• Pressure of hydrogen (H2) = 700 mm Hg
• Pressure of oxygen (O2) = 600 mm Hg

Since the total volume of the vessel is 1000 cc and we have 500 cc each of hydrogen and oxygen, the total volume of the gases is 1000 cc. According to Dalton's law, the total pressure of the gas mixture is the sum of the partial pressures of each gas: Total pressure = Pressure of H2 + Pressure of O2 = 700 mm Hg + 600 mm Hg = 1300 mm Hg So, the final pressure of the gas mixture will be 1300 mm Hg. Therefore, none of the provided options match the calculated value. It seems there might be a mistake in the provided options.