Not sure what you exactly mean, but I think what you are talking about are the spheres of earth (Lithosphere, Hydrosphere, Atmosphere, and Biosphere.)
Lithosphere (Terrestrial) is the land on earth. Hydrosphere (Hydrologic) is the water on earth.
I'm not sure if this is 100% correct but I'm guessing this is what you are referring to. It could be different across different science classes.
For the purpose we will use solution dilution equation:
c1V1=c2V2
Where, c1 - concentration of stock solution; V1 - volume of stock solution needed to make the new solution; c2 - final concentration of new solution; V2 - final volume of new solution.
c1 = 100%
c2 = 75%
V1 = 1 gal
V2 = ?
When we plug values into the equation, we get following:
100 x 1 = 75 x V2
V2= 100/75 = 1.33 gal
Now we can determine the necessary volume of water:
V(water)= V2 - V1 = 1.33 - 1 = 0.33 gal water should be added
Answer:
chemists created medicine to help fight leukemia.
Explanation:
