Answer:
The degree of dissociation is 1
thus the fraction dissociated is one
Explanation:
The depression in freezing point is a colligative property and depends upon the number of solute particles present in the solution.
The relation between depression in freezing point and molality is:
For water
Kf=1.86 °C/m
Where
i= Van't Hoff factor
For electrolytes the i depends upon on the extent of dissociation
i = αn + (1 - α)
Where
α = is degree of dissociation
Let us put the values
Putting value:
Ammonia undergoes combustion with oxygen to produce nitric oxide and water. The volume of the oxygen required to react with 720 ml of ammonia is 900 ml.
<h3>What is volume?</h3>Volume is the area occupied by the substance and is the ratio of the mass to the density.
At STP, 1 mole of gas occupies 22.4 L of volume
Given,
Volume of ammonia reacted = 0.720 L
The combustion reaction is shown as,
From the stoichiometry of the reaction, it can be said that,
L of ammonia reacts with
L of oxygen gas.
So, 0.720 L of ammonia will react with:
Therefore, the volume of oxygen required is 900 mL.
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