Answer:
The concentration of KBr is
Explanation:
From the question we are told that
The mass of KBr is 
The molar mass of KBr is 
Volume of water is
This implies that the volume of the solution is 
The number of moles of KBr is

Substituting values

The concentration of KBr is mathematically represented as
Answer:
F i think i pretty sure F!!!!!!!!
Increase in kinetic energy as well as energy loss to the surroundings in the form of heat ( negligible)
The question asks average kinetic energy. So it is only related with the temperature. The higher temperature is, the higher kinetic energy is. So the answer is (4).