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Determine what amount of heat is required to increase the temperature of sixty grams of ethylene glycol from 15.1 degree Celsius to 40.3 degree Celsius?

Determine the pH of one litre of the buffer solution that has 0.100 M HF and 0.120 M NaF after 0.020 of Nitric acid is mixed? The Ka of HF = 3.5 x 10-4, pKa = 3.46.

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