April 18, 2015

Homework Help: Chemistry

Posted by Cliff on Wednesday, November 24, 2010 at 12:41pm.

Please let me know how I'm doing with the following chemistry problems. I appreciate your imput.
Here's problem 1:

A sample of Helium gas occupies a volume of 29.4mL AT 18deg.celcius.
(a)Would the volume of this gas sample be doubled at 36deg.celcius?
(b)At what temperature(degree celcius)would the volume of the gas be cut in half?

Solution (a): finding V2
=29.4mL * 309k/291k = 31.2mL

Solution(b):finding T2
T2=V2T1/V1=31.2mL*291K/29.4mL =309K

Question 2

If 3.25 mol of Argon gas occupies a volume of 100L,what volume does 14.15 mol occupy?

Since 1 mol of a gas at STP= 22.4L
14.15 mol Ar * (39.95/1 mol Ag)*(22.4L/1 mol Ar)= 12,226L

The way I've solved question 2 looks strange.

Answer this Question

First Name:
School Subject:

Related Questions

Chemistry - a sample of helium gas has a volume of 1.25L at -125celcius and 50....
Chemistry - I'm having trouble trying to figure out how to setup and solve these...
Chemistry - Tutors: thanks for your help. Is this how this problem is solved ? A...
Chemistry - Please let me know how I am doing with the following three chemistry...
chemistry - 1 ) A sample of vapor occupies a volume of 125 ml at 100 celcius ...
chemistry - a sample of helium gas has a volume of 6.50L at a pressure of 845mm ...
Chemistry - A sample of gas occupies a volume of 63.1 mL. As it expands, it does...
Chemistry - A sample of methane (CH4) gas contains a small amount of helium. ...
Chemistry - A gas occupies a volume of 140 mL at 35 degrees celcius and 97 kPa. ...
chemistry - a sample of hydrogen occupies a volume of 950 mL at -15.3 degrees ...