7. In an atom, electrons revolve around the nucleus in their shell. The K shell can only accommodate 2 electrons while L shell can accommodate 8 electrons. Give​

What is the average rate of the reaction between 10 and 20 s?

Areaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

Which of the following describes qualitative data? a) recording the temperature of a solid as it is warmed. b) noting the color of a solution as it is heated. c) measuring the volume of an object by water displacement. d) taking the mass of an object using a balance.