Sunday

April 20, 2014

April 20, 2014

Posted by **Amy** on Monday, September 10, 2012 at 9:36pm.

a.) Calculate the true volume of the flask.

b.) The flask is considered "empty," but it in fact contains air, which has a density = 0.0012250 g/mL. When it contains a gas at 100.0 C, its mass is 26.3415 g. Calculate the molar mass of the gas.

c.) Elemental analysis of the gas shows that it is composed of 85.63 % C, 14.37 % H, and no other elements. What is the molecular formula of the gas?

I'm stuck on a.) and I can't continue to the next part. Any help is appreciated!

- Chemistry -
**DrBob222**, Monday, September 10, 2012 at 10:41pmI don't think the answer to a is used in the other questions.

mass Hg + flask = 176.2510 g.

mass empty flask = -26.3251

----------------------------

mass Hg 176.2510-26.3251 = ?

volume = mass/density = substitute and solve for volume

- Chemistry -
**Amy**, Monday, September 10, 2012 at 10:48pmFor the true volume of the flask I got 11.0777 mL.

For part b.) I am trying to use the formula:

molar mass = mRT/PV, however I don't know what number to substitute for V.

**Related Questions**

Chemistry - What is a method for determining the specific heat for a metal like ...

Calculus - Volume By Integration - Find the volume of the solid generated by ...

chemistry - determining the concentration of a strong acid HCl when your given ...

Chemistry - Propose a method for determining the specific heat for a metal like ...

Chemistry - Propose a method for determining the specific heat for a metal like ...

Biostatistic - An enzymatic method for determining alcohol in wine is evaluated ...

Chemistry - Propose a method for determining the specific heat for a metal like ...

Calculus - Volume by Integration - Find the volume of the solid generated by ...

English Grammar - 1. Reading a message is convenient for him. 2. To read a ...

business - A telephone conversation may not be as acceptable a method for ...