Answer:
0.068 g
Explanation:
The equation that is used to determine the fraction q remaining in water of volume V₁ after n extractions of volume V₂ is:
qⁿ = (V₁/(V₁ + KV₂))ⁿ
Substituting in the values gives the fraction of caffeine left in the water phase:
q³ = (4.0mL/(4.0mL + 4.6(2.0mL))³ = 0.0278
The fraction of caffeine extracted into the methylene chloride phase is:
1 - 0.0278 = 0.972
The amount of caffeine extracted into the methylene chloride is:
(0.070g)(0.972) = 0.068 g
It's B
because ionic molecules are not soluble in oil
polar molecules are soluble in water
nonpolar molecules are not soluble in water
and metals are not soluble neither in water nor in oil
Answer:a) Mass of 
in mixture = 26.3 grams
b) Mass of 
in mixture that can be recovered= 21.5 grams
Explanation:
Given :
Total Pressure = pressure of krypton + pressure of carbon dioxide = 0.751 atm
pressure of krypton = 0.231 atm
Thus pressure of carbon dioxide = 0.751 - 0.231 =0.52 atm
As we know:
where,
= partial pressure
= total pressure = 0.751 atm
= mole fraction
For
For
Total mass = Mass of + Mass of krypton = 30.8 + 25.2 = 56 g
Percentage of 
a) Thus Mass of in mixture =
Percentage of 
b) Thus Mass of in mixture that can be recovered=
say, a fridge is a nonliving thing. but its characteristic is that it keeps food cold and hold the food (I think that's what you mean)
