**Answer:**

**0.67 atm**

**Explanation:**

From the question,

Applying Boyles law

PV = P'V'......................... Equation 1

Where P = Initial Pressure of the sample of gas, P' = Final pressure of the sample of gas, V = Initial volume of the sample of gas, V' = Final volume of the sample of gas.

make P' the subject of the equation above

P' = PV/V'.................... Equation 2

Given: P = 10.0 L, V = 1.0 atm, V' = 15.0 L

Substitute these values into equation 2

P' = (10.0×1.0)/15.0

P' = 0.67 atm

**Answer:**

Ratio is 4:1

**Explanation:**

from graham's law of gaseous diffusion:

but Ra = 2Rb:

L

mol/dm³ is measure for molarity

Solubility=when something has the ability to dissolve in a liquid

Solvent=what the soluble item dissolves into

Example: salt and water

salt can dissolve in water, making it soluble and the water would be the solvent

(I know you asked for one but since they go together I figured I'd just give you both)