What atomic property is different in each isotope of an element?
1 answer:
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Answer: -227 kJ
Explanation:
The balanced chemical reaction is,
The expression for enthalpy change is,
where,
n = number of moles
(as heat of formation of substances in their standard state is zero
Now put all the given values in this expression, we get
Therefore, the enthalpy change for is -227 kJ.
Answer: A. Acids have a slippery feel.
Explanation:
Acid : It is a substance that has ability of donating proton or hydrogen ion, .
The properties of an acid are :
Acids are sour in taste.
The texture of an acid solution is sticky.
It changes the color of the litmus paper to red.
It react with a metal to give compound and hydrogen gas.
Base : It is a substance that has ability of donating hydroxide ion, .
The properties of an base are :
Base are bitter in taste.
The texture of a base solution is slippery.
It changes the color of the litmus paper to blue.
It does not react with a metal.
Thus bases have slippery nature and not acids.