Calculate the average speed of a complete round trip in which the outgoing 220 km is covered at 96 km/h , followed by a 1. 0-h lunch break, and the return 220 km is covered at 62 km/h.

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air