Answer : The concentration in (M)of bromide ions in a saturated solution of mercury (II) bromide is, 
Explanation :
The solubility equilibrium reaction will be:
Let the molar solubility be 's'.
The expression for solubility constant for this reaction will be,
![K_{sp}=[Hg^{2+}][Br^{-}]^2](https://tex.z-dn.net/?f=K_%7Bsp%7D%3D%5BHg%5E%7B2%2B%7D%5D%5BBr%5E%7B-%7D%5D%5E2)
Given:
= 
Now put all the given values in the above expression, we get:
Therefore, the concentration in (M)of bromide ions in a saturated solution of mercury (II) bromide is,
Answer:
writing.
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Answer : The volume of gas sample will be, 9.93 L
Explanation :
Charles' Law : It states that volume of the gas is directly proportional to the temperature of the gas at constant pressure and number of moles of gas.
Mathematically,
where,
are the initial volume and temperature of the gas.
are the final volume and temperature of the gas.
We are given:
Now put all the given values in above equation, we get:
Therefore, the volume of gas sample will be, 9.93 L
Answer:
Option C. Silver is a catalyst in this reaction.
Explanation:
From the question given, we discovered that the addition of silver in the reaction between ethene and oxygen produces epoxyethane at a much faster rate. This simply means that silver act as a catalyst in this reaction.
A catalyst is substance that increases the rate of a reaction without itself taking part in the reaction. The catalyst creates an alternate path way by lowering the activation energy so that the reaction can proceed at a much faster rate.
Since the addition of silver makes reaction to occur at a much faster rate, it therefore means that silver act as a catalyst in the reaction.
If oxygen has 8 valence electrons on it last ring then oxygen will be stable.
