Question

what is the molarity of a solution in which 0.257 moles of HNO2 is dissolved in 490ml of water

Answer 1

Answer:

= 0.524M

Explanation:

data;

volume = 490ml

              = 490 / 1000

               = 0.49 dm^3

moles = 0.257 moles

molarity = ?

solution:

molarity = $\frac{no. of moles}{volume in dm^3}$

               = 0.257 / 0.49

 molarity  = 0.524M