20°C
/ 30°C
Number of molecules
Energy
Activated molecules
(Energy-rich molecules)
From the diagram, when the temperatures of reactants are raised from 20°C to 30°C:
The average kinetic energy doubles.
The number of molecules doubles.
The total number of collisions doubles.
The number of molecules having E, or greater doubles,

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

Listenbase your answer to the question on the information below. nuclear radiation is harmful to living cells, particularly to fast-growing cells, such as cancer cells and blood cells. an external beam of the radiation emitted from a radioisotope can be directed on a small area of a person to destroy cancer cells within the body. cobalt-60 is an artificially produced radioisotope that emits gamma rays and beta particles. one hospital keeps a 100.0-gram sample of cobalt-60 in an appropriate, secure storage container for future cancer treatment. which choice represents the correct product for the beta decay of the co-60? fe-60ni-60fe-61ni-61