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The molar volume of a gas expresses the volume occupied by 1 mole of that respective gas under certain temperature and pressure conditions. The most common example is the molar volume of a gas at STP (Standard Temperature and Pressure), which is equal to 22.4 L for 1 mole of any ideal gas at a temperature equal to 273.15 K and a pressure equal ...
Meave60. Dec 31, 2015. The mass of one mole (molar mass) of helium gas is 4.002602 g/mol. Explanation: Since helium is a monatomic gas, its molar mass is its atomic weight (relative atomic mass) on the periodic table in g/mol. Answer link.
1 Answer. Nam D. May 23, 2018. Element. Explanation: An element is a pure substance as well, because if we fill up a balloon with just helium gas, it will only contain helium atoms. On the periodic table of elements, helium is element number 2, and so that should tell you that it's an element of course... Answer link. iOS.
Explanation: H e is a monatomic molecule with a molar mass of 4.003 ⋅ g ⋅ mol−1. You should have a Table in front of you; you will be permitted to use one in every test in Chemistry or Physics you ever sit. Surely you've got a Periodic Table in front of you if you are doing your physics or chemistry homework? He is a monatomic molecule ...
A balloon with a volume of #2.00L# is filled with helium gas at a temperature of #27.0˚C# and a pressure of #1.20 atm#. How many grams of helium are in the balloon? Calculate the molar mass in #"g"/"mol"#of diacetyl (butanedione) given that in the gas phase #100# degrees Celsius and #747# torr, a #0.3060# g sample of diacetyl occupies a volume ...
4.00 g mol. Explanation: You can obtain the molar mass of any chemical element by using the periodic table: The molar mass is usually listed underneath the chemical symbol. The units associated with molar mass is grams per mole (g mol). Answer link. iOS. Android.
The combined gas law relates the variables pressure, temperature, and volume whereas the ideal gas law relates these three including the number of moles. k is a constant. Where P,V,T represent the same variables as in the combined gas law. The new variable, represents the number of moles. 0.0821 (Liters x atmospheres/mol x Kelvin).
We can rewrite this as. V 1 n1 = V 2 n2. Equal volumes of hydrogen, oxygen, or carbon dioxide contain the same number of molecules. STP is 0 °C and 1 bar. One mole of an ideal gas occupies 22.71 L at STP. Thus, its molar volume at STP is 22.71 L. Example Problem. A 6.00 L sample at 25.0 °C and 2.00 atm contains 0.500 mol of gas.
When Z <1, the attractive forces dominate, and when Z> 1, the repulsive forces dominate, when it comes to the volume of 1 mol of the gas at STP (1 bar, 0∘C). For helium, Z = 1.0005 at 1.013 bar and 15∘C, so helium is close enough to ideal. NOTE: Even if you use the Ideal Gas Law, the only thing you need to turn it into what I would call the ...
Question #c7420. Dalton's Law of Partial Pressure states that the total pressure in a container will be the sum of the individual pressures of the gases present in a container. P t = P 1 + P 2 + P 3 + etc. Here is a video which discusses an application of this law. Many chem classes will perform an experiment to collect a gas (Hydrogen, butane ...