# School girl

Most popular questions and responses by School girl
1. ## chimistry

You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 100.0 ppm and is initially uniform through the thickness of the

2. ## Chemistry

what is the standard heat formation of F3O4. i know for F2O3 is -824.2. is this the same for F3O4????

3. ## social studies

who won the french and indian war?

4. ## chimistry

A latex balloon, wall thickness 3.091 x 10-4 m, contains helium at a concentration of 0.82 kg m-3. Under these conditions the total surface area of the balloon is 0.39 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 10-9 m2s-1.

5. ## chemistry

Chemical analysis of a silicon crystal reveals gallium at a level of 3.091*10^-7 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free

6. ## chimistry

Sulfur vapor is analyzed by photoelectron spectroscopy (PES). Measurements determine that photoelectrons associated with the 1st ionization energy of sulfur move with de Broglie wavelength λ=3.591 A˚. What is the maximum wavelength (in meters) of

7. ## math

tell how you did it thank you Write an equation using n and t. The total bill (t) was twenty times the number of people (n). t=20n t total bill was equals 20t 20 times number of people some purists will insist on writing it 20n = t either way is correct

1. ## Math

it is 5 feet because 10 divided by 2 is 5

posted on October 15, 2019
2. ## Language Arts

yes I think those are correct 6. A 7.B 8.D

posted on March 14, 2018
3. ## chemistry

posted on February 24, 2013
4. ## chemistry

I did it but it was wrong! :( Is the answer in meter?

posted on February 24, 2013