How many grams of zinc metal are required to produce 5.00 liters of hydrogen gas at stp according to the follow equation Zn(s) + 2 HCl(aq) -> ZnCl + H 2(g)

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

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