Areaction generates hydrogen gas (h) as a product. the re-
actants are mixed and sealed in a 250.-ml vessel. after
20.0 minutes, 3.91 x 10-2 mol h, has been generated.
calculate the average rate of the reaction.

Naoki's bicycle has a mass of 10 kg. if naoki sits on her bicycle and starts pedaling with a force of 168 n, causing an acceleration of 2.8 m/s2, what is naoki's mass?

Which of the following describes a situation where competition between producers exists

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.