Which of the following molecules would diffuse the fastest? a) Xenon, Xe b) Ammonia, NH3 c) Carbon dioxide, CO2 d) Krypton, Kr

6, Calculate the ratio of the rate of effusion of neon to the rate of effusion of krypton. Group of answer choices A, 1:4 B, 4:1 C, 3:1 D, 2:1 E, 1:2   7.The behavior of SF6(g) is most likely to behave according to the ideal gas law at: Group of answer choices A, 0.20 atm and 200°C. B, 0.20 atm and -200°C. C, 200 atm and 200°C. D, 200 atm and 0.20°C.

A student produced 347 mL of hydrogen gas at -37.5 °C and constant atmospheric pressure. At what temperature (°C) will this gas expand to a volume of 750 mL?

Two hundred liters (200 L) of Ammonia at STP is produced by the combination of     Nitrogen and Hydrogen. How many liters of Nitrogen is needed?     Balanced Chemical reaction:      N2  +  3H2  -----> 2NH3

1) what is the volume (in liters) of a 5.18 gram sample of NH3 gas at STP?

The average molecular speed in a sample of AR gas at a certain temperature is 432 m/s. The average molecular speed in a sample of CH4  gas is  m/s at the same temperature.

Which gas has the greater effusion rate, helium (He) or uranium hexafluoride (UF6)? (A) (B) Не UF6

A substance containing only carbon and hydrogen is analyzed and found to contain 85.7% carbon by mass. A gaseous sample of the substance is found to have a density of  1.87 g/L at STP.   a)What is the molar mass of the compound?   b)What are the empirical and molecular formulas of the compound?   c)What are two possible Lewis structures for molecules of the compound. Hint: In one of the structures C atoms can form a ring (all C atoms are connected to each other)

In an experiment, 175 mL of nitrogen gas was collected over water at 23.5 oC and 757 mmHg. What mass of nitrogen gas was obtained? At the temperature of the gas (23.5 oC), the vapor pressure of water is 21.8 mmHg.