What is the amount of solute required if the solution is 50 ml and the solvent is 35 ml. Solve and explain If 15 g of salt are dissolved in 180 ml of water, what is the concentration of the solvent Help please

The equation below shows the reaction of zinc with hydrochloric acid (hcl). zn (s) + 2 hcl (aq) —> zncl2 (aq) + h2 (g) what will happen if the concentration of hcl is decreased? a. more zncl2 will be produced. b. the reaction rate will slow down. c. the hydrochloric acid will become more acidic. d. the reaction will produce water instead of hydrogen gas.