A lab group made a copper amine stock solution with a concentration of 0.02 M. A group member transfers 9.27 mL of this solution to a 25 mL volumetric flask and dilutes to the line with water. What is the concentration of the resulting solution?

Answer : The concentration of the resulting solution is, 0.0074 M

Explanation :

Formula used :

where,

are the initial molarity and volume of stock solution.

are the final molarity and volume of diluted solution.

We are given:

Putting values in above equation, we get:

Hence, the concentration of the resulting solution is, 0.0074 M

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

the answer is definitely c.