Breathing as photosynthesis releases oxygen
food as photosynthesis helps the plant to grow
I want to say addition. But I have a tendency to be wrong
Answer:
The ration of molar concentration is "2.5".
Explanation:
The given values are:
Average density of salt water,
= ![1.03 \ g/cm^3](https://tex.z-dn.net/?f=1.03%20%5C%20g%2Fcm%5E3)
Net pressure,
= ![2.00 \ atm](https://tex.z-dn.net/?f=2.00%20%5C%20atm)
Increase in pressure,
= ![1.00 \ atm](https://tex.z-dn.net/?f=1.00%20%5C%20atm)
Now,
The under water pressure will be:
= ![\frac{15 \ m}{10}\times 1 \ atm +1 \ atm](https://tex.z-dn.net/?f=%5Cfrac%7B15%20%5C%20m%7D%7B10%7D%5Ctimes%201%20%5C%20atm%20%2B1%20%5C%20atm)
= ![1.5\times 1+1](https://tex.z-dn.net/?f=1.5%5Ctimes%201%2B1)
= ![1.5+1](https://tex.z-dn.net/?f=1.5%2B1)
= ![2.5 \ atm](https://tex.z-dn.net/?f=2.5%20%5C%20atm)
hence,
The ratio will be:
= ![\frac{(\frac{n}{V})_{15m} }{(\frac{n}{V})_{surface} }](https://tex.z-dn.net/?f=%5Cfrac%7B%28%5Cfrac%7Bn%7D%7BV%7D%29_%7B15m%7D%20%7D%7B%28%5Cfrac%7Bn%7D%7BV%7D%29_%7Bsurface%7D%20%7D)
or,
= ![\frac{P}{P_s}](https://tex.z-dn.net/?f=%5Cfrac%7BP%7D%7BP_s%7D)
= ![\frac{2.5}{1}](https://tex.z-dn.net/?f=%5Cfrac%7B2.5%7D%7B1%7D)
= ![2.5](https://tex.z-dn.net/?f=2.5)
Answer:
D
Explanation:
In a Helium (He) atom, the atomic structure of the atom has 2 protons, 2 electrons and 2 neutrons. For an element X to be a Helium (He) atom, it must possess 2 protons. The number of neutrons present will determine its stability either if its probably radioactive or a natural occurring inert gas.
In option 1,
We have H-2. The symbol "H" is used to denote the element hydrogen in the periodic table and hydrogen has only 1 protons and 1 neutron making its mass number 2.
Option 2,
He -2 : here in this option, we have a helium atom, but with mass number of 2 only. Judging from the formula of mass number = protons + neutrons, we already have proton as 2, hence the number of neutrons there is zero (0)
Option 3,
He - 3 : just like in option 2, the only difference here is that the mass number is 3 hence making the number of neutrons just 1.
Option 4,
He - 4 : This option met the requirements of having 2 protons and 2 neutrons making a total of 4 which corresponds to the mass number.
Well, if you look at group 1 of the periodic table, you will notice a thrend. All elements in group 1 have 1 valence / outer electron. Then you look at period 2, 3, 4 and so on, you will see that the group number corresponds the number of valence/ outershell electrons. Hence, the group determines the electron(s) on the outershell.