Which energy level requires the most energy to remove an electron?
a- the shell containing valence electrons
b-the next to outermost shell
c- the innermost shell
d- none of the sbove

Idon’t know how to solve this question

Explain the relationship between forward and backward reactions in equilibrium, and predict how changing the amount of a reactant (creating a tension) will affect that relationship.

A2.5% (by mass) solution concentration signifies that there is a 2.5 % (by mass) solution concentration signifies that there is blank of solute in every 100 g of solution. of solute in every 100 g of solution