Rhodium-105 has a half-life of 105 years. How much of a 100 gram sample would remain after 420 years?

In this synthesis reaction what products will form

When a scientific theory has been tested and proved by the scientific community, it becomes a law

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