Answer:
True
Explanation:
The physical changes are reversible in most cases and these changes are not the chemical changes which means that it is only the change in its state not in their nature. Just take the example of water, on cooling it becomes solid and change in color can be seen which is white in solid form and colorless in liquid form. This is also reversible and is a physical change. This means that physical changes can be identified at macroscopic level. Hence the answer is true.
Answer:
Dehydration Reaction
Explanation:
Alcohols can be converted into Alkenes using catalytic amounts of acids as a catalysts.
The water molecule is removed hence, it is called as dehydration reaction.
The reaction is attached.
No, the properties of a substance are not affected by the amount of a substance.
Answer:
8.33 atm
Explanation:
Xe is 5 out of (4+5) or 5 / 9 ths of the gas present
5/9 * 15 atm = 8.33 atm