The acid-dissociation constants for three acids are
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<u>Answer:</u> The mass of HF reacted is 150 g.
<u>Explanation:</u>
We are given:
Amount of energy released = -345 kJ
For the given chemical reaction:
By Stoichiometry of the reaction:
184 kJ of energy is released when 4 moles of hydrofluoric gas is reacted.
So, 345 kJ kJ of energy will be released when = of hydrofluoric gas is reacted.
Now, to calculate the mass of HF, we use the equation:
Molar mass of HF = 20 g/mol
Moles of HF = 7.5 moles
Putting values in above equation, we get:
Hence, the mass of HF reacted is 150 g.