How many moles of solid naf would have to be added
How many moles of solid NaF would have to be added to 1.0 L of 1.90 M HF solution to achieve a buffer of pH = 3.35, assume there is no volume change. (Ka for HF = 7.2 x 10-4).
A) 2.3
B) 4.9
C) 1.6
D) 1.0
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Direct labor standards at Cepeda Manufacturing Corporation allow 5 direct labor-hours for every unit produced. The standard direct labor rate is $12.00 per hour.
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