The diagram below shows earth as viewed from space as it moves around the sun approximately how long does it take earth to move from position a to position b? A. 6 months
B.12 hours
C. 1 year
D. 1 day

It would take 12 hours.

Explanation:

It takes 24 hours to move from point A back to it's position. So if it goes half way you divide by two and you get 12. So it would be B.

The answer to your question is 1.51 moles of PBr₃

Explanation:

Data

moles of Br = 2.27

moles of PBr₃ = x

Balanced chemical reaction

                   2P   +   3Br₂  ⇒   2PBr₃

             Reactant      Element     Products

                   2                  P                 2

                   6                  Br                6

-Use proportions to find the answer

              3 moles of Br₂  2 moles of PBr₃

         2.27 moles of Br₂  x

               x = (2.27 x 2) / 3

               x = 4.54 / 3

              x = 1.51 moles