Question

You have a freshly prepared 1 M (molar) solution of glucose in water. You carefully pour out a 100 mL sample of that solution. How many glucose molecules are included in that 100 mL sample?

Answer 1

`6.022* 10^(22)`glucose molecules are included in that 100 mL sample.

Step-by-step explanation:

Concentration of freshly prepared glucose solution = 1 M = 1 mol/L

1 L = 1000 ml

This means that 1 mole of glucose is present in 1000 mL of water.

If we have 100 mL of solution. then number of moles of glucose will be L;

`(1)/(1000)* 100 mL=0.1 mole`

1 mole =
`N_A=6.022* 10^(23)` molecules/atoms

Number of molecules of glucose in 0.1 mole :

=
`0.1 mol* 6.022* 10^(23) molecules=6.022* 10^(22) moleules`