18. If 50 mL of a 200 mL sample of 0.10 M sodium chloride solution is spilled, what is the
concentration of the remaining solution?

What is conserved in the reaction shown below? h2(g) + cl2 (g) --> 2hcl(g)a. mass onlyb. mass and moles onlyc. mass, moles, and molecules onlyd. mass, moles, molecules, and volume