The air pressure is a measure of the pressure of the air. The vapour pressure of a liquid, say, water, is a function of its temperature and does not depend on the air pressure. ... Its vapour pressure is higher than atmospheric pressure so its temperature is higher than the boiling point of water.
Answer: 4.22 grams of solute is there in 278 ml of 0.038 M 
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
where,
n = moles of solute
= volume of solution in L
Now put all the given values in the formula of molality, we get

mass of
= 
Thus 4.22 grams of solute is there in 278 ml of 0.038 M 
1. Atoms are mostly empty space
2. Atoms have a concentration of positive matter somewhere in them
3. The concentration of this positive matter is very small
<span>A. It increases the number of collisions between molecules.
I hope this helps :)</span>