What is the molarity of a solution that contains 7.0 moles of solute in 9.0 liters of solution?

Explanation:

In order to calculate the molarity of the solution we use the formula

where

c is the molarity

n is the number of moles

v is the volume in dm³

From the question

n = 7 mol

v = 9 L = 9 dm³

We have

We have the final answer as

Hope this helps you

Option B

Explanation:

Cell membrane can be defined as the outermost covering of the cell which allows the movement of particles across membrane. The particles are allowed to move from inside of the cell to the outside of the cell and from outside to inside of the cell.

This kind of a membrane is known as selectively permeable which allows the movement of certain molecules only.

hence, the correct answer is option B