9. What is a light-year? A a unit of mass B a unit of distance C unit of volume Please help ! it is timed Please help me I'll give 20 points points please

(1.6 × 10-19)(5.0 × 106) = c × 10d identify the missing numbers below to show the result of multiplying the numbers.

Stage in which a typical star has completely stopped fusion

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.