Question- part 1 what is the density of he at stp why do, Ask an Expert

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Question- Part 1) what is the density of He at STP? why do helium-filled balloons rise in air?

Part 2) if 16.0g of O2 and 2.2g CO2 are placed in a 5.00-L container at 21C, what is the pressure of this mixture of gases?

Part 3)a mixture of cyclopropane gas and oxygen is used as an anesthetic, cyclopropane contains 85.7%C, and 14.3%H by mass. At 50.0C and 0.984 atm pressure 1.56g cyclopropane has a volume of 1L. What is the molecular formula of cyclopropane?

State your answer as a chemical formula.

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Category:- Chemistry
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