A sample of a gas originally at 25 C and 1.00 atm pressure in a Online chemistry calculator to calculate root mean square (RMS) speed of gas, using gas molecular mass value. 2003-2023 Chegg Inc. All rights reserved. "How to Calculate the Density of a Gas." Which instrument measures the pressure of an enclosed gas? The more powerful and frequent these collisions are, the higher the pressure of the gas. Helmenstine, Todd. For example, the organic molecule ethane (CH3CH3) reacts with oxygen to give carbon dioxide and water according to the equation shown below: 2 CH3CH3 (g) + 7 O2 (g) 4 CO2 (g) + 6 H2O (g). What is the new volume of the gas in a #"33.0-L"# balloon that rises from an altitude with a pressure of #"100.4 kPa"# into the stratosphere where the pressure is #"21.8 kPa"#? This example problem demonstrates how to use Avogadro's law to determine the volume of a gas when more gas is added to the system. A gas occupies #"1.46 L"# at a pressure of #"1.00 bar"#. The pressure is increased to gas 760 mm Hg at the same temperature. Experts are tested by Chegg as specialists in their subject area. If the temperature of a fixed quantity of gas decreases and the pressure remains unchanged. The carbon dioxide collected is found to occupy 11.23 L at STP; what mass of ethane was in the original sample? What is its volume at STP? He has authored Dummies titles including Physics For Dummies and Physics Essentials For Dummies. Dr. Holzner received his PhD at Cornell.