Recent content by waqaszeb

Hello, If I get 2.0830 grams of tobacco and add 1 gram of barium hyrdoxide to it. Mix it in 100 mL of chloroform:toluene mixture, I essential have a 100 mL solution right? Now I take a 25 mL aliquote from that? what will be the mass in grams of tobaco in that 25 mL sample? I thought simply...

Homework Statement A sled is pulled with a horizontal force of 15 N along a level trail, and the acceleration is found to be 0.38 m/s2. An extra mass m = 4.2 kg is placed on the sled. If the same force is just barely able to keep the sled moving, what is the coefficient of kinetic friction...

Homework Statement When a car is traveling at 22 m/s on level ground, the stopping distance is found to be 22 m. This distance is measured by pushing hard on the brakes so that the wheels skid on the pavement. The same car is driving at the same speed down an incline that makes an angle of...

Got it. Thank you so much!

Yes it does, thank you for pointing this out! wow..one whole day wasted on trying to figure out why i was so dumb..

Sorry, you're right. Its not 0.1083 but 1.0083 grams

Hi guys, I am doing a lab experiment which involves analysis of a sample of a mixture of NaCl and KCl. I'm using volumetric titration ( Mohrs and Fajans methods) as well a Gravimetric analysis technique. The underlying idea is determine the mass percent of chloride in the same sample using...

Here's what I did: dv/V = \alpha dt = \alpha T (100-0) [ after integration ] = \alpha (100-0) = \alpha (100) = 10.43 for me.. I added the three quantities of alpha and then multiplied by 100. I also multiplied each individual quantity to 100 and then added them together. the answer is...

I integrated both (ΔV/V)= (alpha) dt [from 0 to 100] = alpha (100) = wrong answer and (ΔV/V) = (alpha)(T) dt [ from 0 to 100) = alpha x 2 x ( 100^2 - 0^2 ) = 20.86 the answer in the back of my textbook says the answer is 13.8 %

Hey, thanks for you help! I got ΔV/V = (alpha)(T dt), which I integrated from 0 to 100. The answer I get now is 20.86..I'm not sure what I'm doing wrong.. As for the units of alpha..I don't know why its t and not T. This is a question from Chemical Thermodynamics by Peter A. Rock.

Homework Statement The coefficient of the thermal expansion of ethanol is given by: \alpha (per degree Celsius) = 1.0414 x 10^(-3) + 1.5672 x 10^(-6) t + 5.148 X 10^(-8) t^2 Calculate the percentage change in volume when ethanol is heated from 0 to 100 (celsius) at constant pressure...