What volume of water is needed to dilute 10.0 mL of 2.0 M HCl to make a 0.25 M HCl solution?

Enough to make 50. ml of solution
B. Enough to make 60. mL of solution
C. Enough to make 70. mL of solution
D. Enough to make 80. mL of solution

Consider the following reaction at equilibrium. 2co2 (g) 2co (g) + o2 (g) h° = -514 kj le châtelier's principle predicts that the equilibrium partial pressure of co (g) can be maximized by carrying out the reaction a. at high temperature and high pressure b. at high temperature and low pressure c. at low temperature and low pressure d. at low temperature and high pressure e. in the presence of solid carbon