The correct answer is B. The concentration of a solution does not decreases when you add more solute to the solvent. Instead, the concentration increases. Concentration is expressed as the amount of solute per unit of solvent. Therefore, increasing the solute, increases this value and increasing the solvent, decreases this value.
Answer:
A pH=3 is 1000 times as acidic as a pH=6.
I'd say it is an element. It is not a compound, it doesn't do things on its own like us. It's an element like fire and water.
Answer:
The wavelength of sunlight is required to break the bond in one oxygen molecule is 242 nm.
Explanation:
Energy required to break the 1 mol oxygen-oxygen bond:
=495 kJ=495000J
1 mol =
molecules
Energy required to break 1 molecule of oxygen molecule= E
= 
The energy required to break the 1 molecule of oxygen is equal to enrgy of one photon of a sunlight.

where,
= wavelength of the light
E = energy of the photon
h = Planck's constant = 
c = speed of light = 


The wavelength of sunlight is required to break the bond in one oxygen molecule is 242 nm.