Question

$500\text{ mL}$ of an aqueous solution of glucose $\text{C}_6\text{H}_{12}\text{O}_6$ (Molar mass $180\text{ g mol}^{-1}$) contains $02 \times 10^{22}$ molecules. The concentration of the solution will be:

• A. $2.0\text{ M}$
• B. $1.0\text{ M}$
• C. $0.2\text{ M}$
• D. $0.1\text{ M}$

Hint:

Notice the exponents in the scientific notation: $10^{22}$ divided by $10^{23}$ is exactly $0.1\text{ moles}$. Since $0.1\text{ moles}$ are dissolved in half a liter ($500\text{ mL}$), doubling it to find the amount per full liter gives a concentration of $0.2\text{ M}$ in seconds.

Answer 1

The Correct Option is C