**Answer:**

151 g/mol

**Explanation:**

In order to solve this problem we need to keep in mind the formula for the <em>boiling point elevation</em>:

Where:

- ΔT is the temperature difference between the boiling point of the solution and that of pure water. 100.37 °C - 100.00 °C =
** 0.37 °C.**

- <em>m</em> is the molarity of the solution

- i is the van't Hoff factor.
**As the solute is a nonelectrolyte, the factor is 1.**

Input the data and <u>calculate </u><em><u>m</u></em>:

- 0.37 °C = 0.51 °C/m * <em>m</em> * 1

We now can <u>calculate the number of moles of the substance</u>, using the <em>definition of molarity</em>:

- molarity = moles of solute / kg of solvent

In this case kg of solvent = 90.0 g / 1000 = 0.090 kg

- 0.72 m = moles / 0.090 kg

Finally we <u>calculate the molar mass</u>, using the <em>number of moles and the mass</em>:

- 9.81 g / 0.065 mol = 151 g/mol

The object kinda had a tint to them and I would look at the type of color and look at a color spectrum.

**Answer:**

**Explanation:**

We are given that

Diffusion coefficient,

Thickness of membrane,

Area,

Concentration differences,

We have to find the flow rate of sodium ions.

Flow rate,

Using the formula