It is a physical separation.
Only chemical separation involves the changing of substances and their bondings, which usually involves the use of heat or electricity. Meanwhile, physical changes does not require breaking the bonds of substances or changing a substance to another, common examples of physical separations are such as filtration or distillation.
Since straining pasta from water does not require breaking the pasta or water to other substances, plus heat and electricity is not involved, therefore this is a type of physical separation.
CH4+ 2O2---> CO2+ 2H2O I believe would be correct.
Answer:
0.154 M
Explanation:
In case of titration , the following formula can be used -
M₁V₁ = M₂V₂
where ,
M₁ = concentration of acid ,
V₁ = volume of acid ,
M₂ = concentration of base,
V₂ = volume of base .
from , the question ,
M₁ = ? M
V₁ = 25.0mL
M₂ = 0.10 M
V₂ = 38.52 mL
Using the above formula , the molarity of acid , can be calculated as ,
M₁V₁ = M₂V₂
Putting the respective values ,
M₁ * 25.0mL = 0.10 M * 38.52 mL
M₁ = 0.154 M
Answer : The mole fraction of the non-volatile solute in the solution is 0.195
Explanation :
According to the relative lowering of vapor pressure, the vapor pressure of a component at a given temperature is equal to the mole fraction of that component of the solution multiplied by the vapor pressure of that component in the pure state.
Formula used :
where,
= vapor pressure of the pure solvent (acetone) = 266 torr
= vapor pressure of the solution = 214 torr
= mole fraction of solute = ?
Now put all the given values in the above formula, we get:
Therefore, the mole fraction of the non-volatile solute in the solution is 0.195
