contestada

Verona dissolves 20. grams of NaCl with water to make a 100 ml solution. What is the molarity of the solution? There are 1,000 mL in 1 L O a. 3.4 M O b.0.34 M O G.58 M O d. 20. M

Respuesta :

Answer:

b.0.34 M

Explanation:

Given that:

Mass of NaCl = 20 grams

Molar mass of NaCl = 58.44 g/mol

The formula for the calculation of moles is shown below:

[tex]moles = \frac{Mass\ taken}{Molar\ mass}[/tex]

Thus,

[tex]Moles= \frac{20\ g}{58.44\ g/mol}[/tex]

[tex]Moles= 0.3422\ mol[/tex]

Given that volume = 100 mL

Also,

[tex]1\ mL=10^{-3}\ L[/tex]

So, Volume = 100 / 1000 L = 0.1 L

Considering:

[tex]Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}[/tex]

[tex]Molarity=\frac{0.3422}{0.1}[/tex]

Molarity = 0.34 M

Otras preguntas