Probably the kinetic energy of rubbing the pump against the valve, combined with the increase in gas pressure in the tire itself.
Answer:
Explanation:
It will be better to use solvents that are lighter than water, because their density has an influence on the miscibility . This will give you a better separation during extraction.
Answer:
+5
Explanation:
it hs 5 more protons thant electrons, so it has a positive charge of 5
Depression in freezing point (Δ

) =

×m×i,
where,

= cryoscopic constant =

,
m= molality of solution = 0.0085 m
i = van't Hoff factor = 2 (For

)
Thus, (Δ

) = 1.86 X 0.0085 X 2 =

Now, (Δ

) =

- T
Here, T = freezing point of solution

= freezing point of solvent =

Thus, T =

- (Δ

) = -
D is a correct Lewis Dot structure. Nitrogen has 4 valence electrons.