Answer: D
Explanation:
They form from Coal under high high pressure and many many years
Explanation:
Molecules which are either polar in nature or contain a polar covalent bond are able to dissolve in water. This is because like dissolves like.
For example,
is a polar covalent compound and when it is dissolved in water then its reaction is as follows.

This shows that a chemical reaction will take place when
is dissolved in water.
Also, HI is a polar covalent compound and it will readily dissolve in water as hydrogen iodide (HI) is a polar covalent molecule.
On the other hand,
,
, and
does not dissolve in water as all of these are non-polar covalent compounds.
Thus, we can conclude that the gas most likely to dissolve in water as a result of chemical reaction is
and the gas most likely to dissolve in water because of strong intermolecular interactions is HI.
Answer:
If a metal is less reactive than carbon, it can be extracted from its oxide by heating with carbon. The carbon displaces the metal from the compound, and removes the oxygen from the oxide. This leaves the metal.
Explanation:
Number of molecules NH₃ = 4.45 x 10²²
<h3>Further explanation
</h3>
A mole is a number of particles(atoms, molecules, ions) in a substance
This refers to the atomic total of the 12 gr C-12 which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles
Can be formulated :
N = n x No
N = number of particles
n = mol
No = 6.02.10²³ = Avogadro's number
mol of NH₃ = n = 0.074
So the number of molecules :
