Zadania z chemii IB HL

A second sample of Z was converted completely into vapour at a known temperature and pressure. (i) 0.148 g of the vapour occupied 63.7 $\mathrm{cm^3}$ at 110 °C and a pressure of $1.00 \times 10^{5}$ Pa. Calculate the amount, in mol, of Z in this sample. Use…

A fixed amount of an ideal gas is kept at constant temperature while the volume of its container is decreased by 60 %. How does the pressure of the gas change? $pV = nRT$ A. Pressure decreases by 60 % B. Pressure increases by 60 % C. Pressure increases by 150…

A sample of flue gas has a volume of $2.5 \times 10^{-3}\ \mathrm{m^3}$ at 150 °C and $1.2 \times 10^5$ Pa, and contains 0.20 % $\ce{SO2}$ by volume. Using sections 1 and 2 of the data booklet, calculate the amount, in moles, of $\ce{SO2}$ present.

An ideal gas is held in a rigid, sealed container at 27 °C, where its pressure is $P$ Pa. The container is then cooled to −3 °C. Which expression best describes the new pressure of the gas? A. Slightly less than $P$ B. Slightly more than $P$ C. One ninth of…

Suggest two reasons why less carbon dioxide is collected in the syringe when a greater mass rests on the piston.

A rigid cylinder of fixed volume contains an ideal gas at 250 K and a pressure of 75 kPa. One third of the gas molecules are released, and the temperature of the remaining gas is raised to 500 K. What pressure, in kPa, does the gas now have? A. 50 B. 100 C.…