Presentation is loading. Please wait.

Presentation is loading. Please wait.

Using the Ideal Gas Law and Previously Learned Concepts

Similar presentations


Presentation on theme: "Using the Ideal Gas Law and Previously Learned Concepts"— Presentation transcript:

1 Using the Ideal Gas Law and Previously Learned Concepts
A gas that is 80.0% carbon and 20.0% hydrogen has a density of g/L at STP. Use this info. to calculate its Molecular Weight in g/mol Empirical Formula Molecular Formula Answers: MW = 30.0 g/mol E.F. = CH3 M.F. = C2H6

2 Determining the molar mass of an unknown volatile liquid
Figure 5.11 Determining the molar mass of an unknown volatile liquid based on the method of J.B.A. Dumas ( )

3 Dumas Method of Molar Mass
Problem: A volatile liquid is placed in a flask whose volume is ml and allowed to boil until all of the liquid is gone, and only vapor fills the flask at a temperature of oC and 736 mm Hg pressure. If the mass of the flask before and after the experiment was g and g, what is the molar mass of the liquid? Answer: Molar Mass = = g/mol


Download ppt "Using the Ideal Gas Law and Previously Learned Concepts"

Similar presentations


Ads by Google