Which number completes the balanced chemical equation showing the process of rusting? 4Fe + 3O2 ---> Fe2O3

A. 1

B. 2

C. 4

D. 12

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false

Which statement best summarizes the importance of ernest rutherford’s gold foil experiment? it proved that all of john dalton’s postulates were true. it verified j. j. thomson’s work on the atomic structure. it showed that an electron circles a nucleus in a fixed-energy orbit. it showed that a nucleus occupies a small part of the whole atom.