Diffusion and effusion do not occur at the same time. O True O False

[ A 1.00 L bottle of carbonated cola contains 5.20 g of carbon dioxide dissolved in it. If the evaporating carbon dioxide is trapped in a cylinder at 1.00 atm and 21.0°C, what volume (in L) does the gas occupy? ] V = nRT/P is the correct equation, I believe. [T = 21.0 C + 273.15 = 294.15 K ; P = 1.00 atm ; R = 0.08206 L*atm/mol*K] How do I properly convert 5.2 g of carbon dioxide to n?

At 25 °C a sealed vessel of 27 L contains 1.6 L of pure water (vapour pressure = 24 mmHg), the rest of the vessel contains an inert gas, the total pressure of the cylinder is 1450 mmHg. The vessel is accidently dropped whilst in transit and the new volume of the vessel is reduced to 22 L. What is the total pressure of the sealed vessel after the accident? (assume no change in temperature)

Suppose a volatile liquid is completely vaporized into a 157 mL flask in a 99.1°C boiling water bath. What is the molar mass of the volatile liquid if the corrected mass of the condensed vapor is 0.299 g and the final partial pressure of air in the flask is 687 mm Hg?

All collisions (in chemistry) involving gases are considered to be elastic collisions.  True  False

A 3.13 g block of dry ice (solid CO2) is placed in a sealed flask, where it sublimes and returns to its gaseous form.  The molar density after sublimation is 52.4 mmol/L.  Assuming a constant temperature of 26.0°C, what is the pressure inside the flask in psi once all the CO2 sublimes?

Which of the following is NOT standard temperature or pressure? 760 Torr 101.3 kPa 760 atm 273.15 K

A volatile hydrocarbon (a binary compound of carbon and hydrogen) was determined to be 92.3 % carbon, by mass. In a separate experiment, utilizing the Dumas method, 4.00 mL pure liquid sample of this hydrocarbon is vaporized in an Erlenmeyer flask when the barometric pressure is 768.0 torr.   The empty flask was fitted with a foil cap pierced with a pinhole and weighed 25.3478 g. After the excess gas escaped, the temperature was measured as 98.0 °C. The flask and contents were subsequently cooled to 25 °C and the vapor condensed into a liquid. The weight of the flask and contents is found to be 25.6803 g. The exact volume of the flask was determined to be 128.5 mL.   Using this information, determine both the empirical and molecular formula of this hydrocarbon. Show/explain the steps of your work.