It has lost electrons as electrons are negatively charged particles, hence a loss of electrons will leave the rod positively charged.
As someone descends through a water column, the pressure increases. This happens because water at higher levels exerts weight on the lower layers of water.
The concentration of hydroxide ion of a solution with a pH of 8. 25 is 1.77×
M
Calculation,
The pH of a solution tells us about concentration of the 
ion ( proton ) in solution. However, if we know the value of pH , we can calculate pOH with the help of pH and from pOH we can find concentration of hydroxide ions in the solution.
pH + pOH = 14
8. 25 + pOH = 14
pOH = 14 - 8. 25 = 5.75
Since, pH = -㏒[ ]
Similarly, pOH = -㏒[
]
If pOH = 5.75 , that means that -㏒[ ] = 5.75 ,which means that,
[ ] = 
= 1.77×.
So, we know that the concentration of the ions in the solution with pH of 8.25 is 1.77× Molar
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23. Enzyme A, as the temperature increases, the rate of reaction goes down. However, Enzyme B as the temperature goes up the reaction goes up.
24. Enzyme B is more active in a human cell, the reaction is what you want and everytime the temperature goes up in enzyme B the reaction goes up.
