**Answer:**

8.354 nanometers

**Explanation:**

To treat a diffusive process in function of time and distance we need to solve 2nd Ficks Law. This a partial differential equation, with certain condition the solution looks like this:

Where Cs is the concentration in the surface of the solid

Cx is the concentration at certain deep X

Co is the initial concentration of solute in the solid

and erf is the error function

Then we solve right side,

And we need to look up the inverse error function of 0.001964 resulting in: 0.00174055

Then we solve for x:

A. Theresa is going to be my girl this year, he promised himself as he left the gym full of students in his new fall clothes.

**Answer:**

The density is 0,5 g/cm3

**Explanation:**

The density (δ) is the ratio between the mass and the volume of a compound:

δ=m/v= 3 g/6 cm3= <em>**0,5 g/cm3**</em>

**Answer:**

calcium and gold

**Explanation:**

thats what it said was right

1. Pressure decreases with increasing volume as the increased volume increases space for molecules to move around, thus decreasing the collisions and decreasing pressure.

2. A has a higher pressure given that the higher the n value, or moles present, the higher the pressure will be if everything else is held constant.

3. Gases have weaker intermolecular forces than liquids and solids.

4. Pressure must be 1/2, or 0.5 as PV=k, (P)(4)=(2), (P)=(2/4)

5. 2.25 L

6. Increasing space will decrease collisions and vice versa

7. 1122 2L bottles

8. 2.35 L

9. 2.1428 L

10. It would expand as they are directly proportional

11. 2.14959 L

12. 546K

13. .003663 atm`K

14. If pressure and temperature are directly proportional, then they increase or decrease at a constant rate

15. quadruples as they are directly proportional

16. 18.9963587 atm

Sorry hun, I gotta go. Good luck!