Answer: Physical change
Explanation: Condensation is the phase change of a gas to the liquid state. There is no formation of new products so it does not undergoes chemical change. Any phase change is considered a physical change.
Answer:
When a atom is unstable (It wants to gain or lose a valence electron)
Magnesium and chlorine form an ionic bond. Covalent bonds are formed when two or more atoms share electrons between them. ... So two chlorine anions form an ionic bond with one magnesium cation for form MgCl2, a neutral chemical compound.
<span>distinguishable components
</span><span>components in varying proportions
</span><span>particles that may settle</span>
Answer : The number of moles of 
formed are, 0.69 moles.
Explanation : Given,
Moles of 
= 0.345 mol
Now we have to calculate the moles of
The balanced chemical equation is:
From the balanced reaction, we conclude that
As, 1 mole of react to give 2 moles of
So, 0.345 mole of react to give 
mole of
Therefore, the number of moles of formed are, 0.69 moles.
