a) A sealed glass bottle of volume 4.50L contains 12.5g of NO2 gas. A measurement reveals that the temperature is 28.5 degree celsius. Calculate the pressure of the gas in the container.
b) Somebody puts an expandable balloon on the opening of the bottle, without any gas escaping. The outside pressure is 1.10atm and the temperature has decreased to 25.8 degree celsius. Calculate the new volume of the gas.
c) Through a valve, 7.0g of nitrogen gas is added to the bottle with balloon discussed in b). The temperature and external pressure are constant. Calculate the partial pressure of nitrogen.