What is the mass number of an atom that contains 19 protons, 19 electrons, and 20 neutrons?

Adepositional also feature that forms where a stream enters a lake or an ocean is a

In a copper wire, a temperature increase is the result of which of the following

Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products