You can have a solution of hydrogen peroxide that might say 10% that means that 10% per mass of the hydrogen peroxide solution is the hydrogen peroxide the rest is water.
concentration is the amount of mass in the solution eg 5gdm-3
hope that helps
Males are represented my a square
if he is affected by a defective gene he should show a shaded square that differs from normal males just like this■
The first three quantum numbers for electrons located in subshell 4s are :
