the number of moles of neutrons on 2 gms of oxygen will be
Answers
Answer:
I’ll assume this is for oxygen gas, which is O2, rather than elemental oxygen, which is O.
First, we need to know how many moles of O2 are in 2 grams. O2 has a molar mass of 32, meaning 1 mole of O2 has a mass of 32g. Thus, 2g of O2 has 0.0625 moles of O2,
BUT WHAT THE HELL IS A MOLE? A mole is a unit in chemistry, essentially meaning that it is the unit number times by Avogadro’s number. (NA= 6.022*10^23) Why is this important? Because funny enough, one gram of elemental hydrogen (H) has 6.022*10^23 atoms of H in it. This allows us to scale the number of atoms in a substance to a level that can be practically dealt with!
Now, back to the question. We know that 2g of O2 has 0.0625 moles of O2. That means that the number of O2 molecules present in 2g of O2 is equal to 0.0625*NA. That’s 3.76375*10^22. That is a lot of molecules. And we have not even reached the atomic level!
An O2 molecule has obivously 2 O atoms in it. Since we can only find out the number of electrons from the number of atoms present, we need to calculate how many moles of O are in 2g of O2. What we find is that the number of O atoms is double the number of O2 molecules, since there are 2 O atoms in 1 O2 molecule. That makes our equation 0.0625*2*NA. That’s 7.5275*10^22. Still an astronomically large number.
Now, electrons. For this, we need to recall from the periodic table that oxygen has the atomic number of 8. This means there are 8 protons in an oxygen atom. In a neutrally charged atom, the amount of electrons is equal to the amount of protons. Hence, the amount of electrons in 1 O atom is 8. Since we know that each atom has 8 electrons, we can just add that to our equation. Our final equation becomes:
0.0625 (moles) * 2 (amount of atoms in molecule) * 8 (amount of electrons in atom) * 6.022*10^23 (NA)
This gives us something unusual. The answer is 6.022*10^23, or as we know now, Avogadro’s number. This just means that in 2g of O2, there is 1 mole of electrons.
Explanation:
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Answer:
number of moles of neutrons in oxygen is 1
Explanation:
It is given :
mass of oxygen = 2 grams
We know that the molar mass of oxygen = 16 grams
and one atom of oxygen contains 8 protons and 8 neutrons
As it is given that, one atom of oxygen contains 8 protons and 8 neutrons
Hence, one mole of oxygen contains 8 neutrons and 8 protons.
So, number of moles of atoms of oxygen
n = weight of the element given / molecular mass of the element
or, n = 2 / 16 = 0.125 = 1 / 8
So, number of moles x 8 = 1 which means,
the given number of moles of neutrons is basically eight times the number of moles of oxygen atoms.
So, number of moles of neutrons is 8 x n = 8 x (1/8) = 1
Therefore, number of moles of neutrons in oxygen is 1
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