Answer:
1000 times.
Explanation:
Hello,
In this case, since the pH is defined by:
![pH=-log([H^+])](https://tex.z-dn.net/?f=pH%3D-log%28%5BH%5E%2B%5D%29)
If we want to compute the concentration of hydrogen we must write:
![[H^+]=10^{-pH}](https://tex.z-dn.net/?f=%5BH%5E%2B%5D%3D10%5E%7B-pH%7D)
Thus, for both the backyard soils we compute:
![[H^+]_{pH=7}=10^{-7}=1x10^{-7}M](https://tex.z-dn.net/?f=%5BH%5E%2B%5D_%7BpH%3D7%7D%3D10%5E%7B-7%7D%3D1x10%5E%7B-7%7DM)
![[H^+]_{pH=4}=10^{-4}=1x10^{-4}M](https://tex.z-dn.net/?f=%5BH%5E%2B%5D_%7BpH%3D4%7D%3D10%5E%7B-4%7D%3D1x10%5E%7B-4%7DM)
It means that:
![\frac{[H^+]_{pH=4}}{[H^+]_{pH=7}} =\frac{1x10^{-4}M}{1x10^{-7}M}\\ \\\frac{[H^+]_{pH=4}}{[H^+]_{pH=7}}=1000](https://tex.z-dn.net/?f=%5Cfrac%7B%5BH%5E%2B%5D_%7BpH%3D4%7D%7D%7B%5BH%5E%2B%5D_%7BpH%3D7%7D%7D%20%3D%5Cfrac%7B1x10%5E%7B-4%7DM%7D%7B1x10%5E%7B-7%7DM%7D%5C%5C%20%5C%5C%5Cfrac%7B%5BH%5E%2B%5D_%7BpH%3D4%7D%7D%7B%5BH%5E%2B%5D_%7BpH%3D7%7D%7D%3D1000)
It means that the concentration of hydrogen at a pH of 4 is 1000 times greater than the concentration of hydrogen at a pH of 7.
Regards.
Answer:
Sporophyte generation; gametophyte generation; sperm cells are transported by water to egg cells; spore are transported by air.
Explanation:
> Both ferns and mosses have gametophyte generation followed by sporophyte generation.
> Both are spore bearing and the spores are transported by air.
> The sperm finds the egg cell by chemotaxis and require water for movement.
> They require moisture to thrive.
energy drinks/sports drinks they say its good for you but it really isn't.
Answer: D. economic incentives
Explanation:
Economic incentive refers to the kind of motivation strategy in which the person is provided with financial assistance and fulfill other kind of preferences according to needs, desire and wants of the person in return receiving the required task to be done or for achieving a social goal.
The given situation is an example of economic incentive this is because of the fact that mothers are provided with the paid family leave from work this is helpful in increasing the birth rate of woman. This is in effort for preventing a declining population.
