# How many moles of NaOH are present in 18.5 ml of 0.130 M NaOH?

Apr 28, 2018

We can solve this by the unitary method.

#### Explanation:

0.130 moles are present in 1000 mL (1L) of solution.

color(white)(wwwwww $\text{1000 mL = 0.130 moles}$
color(white)(wwwiwwwww $\text{1 mL" = 0.130/1000 " moles}$
color(white)(wiwwwww $\text{18.5 mL" = 0.130/1000 xx 18.5" moles}$
color(white)(wwwwwwwwwww $= 13 \times 18.5 \times {10}^{- 5} \text{ moles}$
color(white)(wwwwwwwwwww $= 2.41 \times {10}^{- 3} \text{ moles}$

I hope you got this!