Two technicians are discussing back pressure. Technician A says that higher exhaust-system pressure leads to lower manifold vacuum. Technician B says that back pressure can be tested with an oxygen sensor, and EGR valve, or an AIR valve. Who is correct? A. Technician A B. Both Technicians A and B C. Technician B D. Neither Technician A nor B​

Some molecular compounds, such as hcl, ionize completely in solution. for molecular compounds such as h2co3, most molecules do not ionize in solution. which describes the properties of these two solutes? a. hcl and h2co3 have the same effect on the properties of the solution. b. hcl raises the freezing point of water more than h2co3 does. c. hcl raises the boiling point of water more than h2co3 does.