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Element

If water mole...

Question

If water molecule contains two hydrogen and one oxygen atoms. Then why humans are not making it in laboratories?

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Solution

The problem with manufacturing water
It is not as easy as it appears to be. Combination of hydrogen and oxygen atoms is accompanied by release of tremendous amount of energy.

Hydrogen, being the simplest element in the world, consists of only 1 electron in its orbit. Oxygen on the other hand, has 6 electrons in its outermost orbit, 2 short of a completely filled outermost shell. There is an energy barrier which has to be overcome to bring these two elements together.

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Q. Hydrogen combines with oxygen in a 1:8 weight ratio to form water. If every molecule of water contains two atoms of hydrogen and one atom of oxygen, an atom of oxygen must weigh:

Q. Assertion :Molecular formula of water is

(H_{2} O)

. Reason: One molecule of water contains two atoms of hydrogen and one atom of oxygen.

Q. Fill in the blanks.
H₂O is the _______________ of water. It also represents _______________ molecule of water. There are ________________ atoms of hydrogen and _______________ atom of oxygen in H₂O. 2H₂O represents _________________ molecules of water. There are _____________ atoms of hydrogen and _______________ atoms of oxygen in 2H₂O.

Q. Assertion :In the formation of water molecule, both hydrogen and oxygen atoms attain octet of electrons. Reason: Oxygen atom forms two ionic or electrovalent bonds with two hydrogen atoms.

Why we can’t make water by adding 2 molecules of hydrogen and a molecule of oxygen?

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