Calculate the mass of white phosphorus P burns in air, if 2.55 x 10 kJ of energy evolves, according to the following equation.
P + 5O --> PO + 3013kJ/mol

The following questions a24 - a26 relate to 100 ml of 0.0150 m solution of benzoic acid (c6h3cooh). ka(c6h3cooh) = 6.4 x 10^-5. what is the ph of the solution after the addition of 1 x 10^-3 moles of naoh? you may assume no volume change to the solution upon addition of the naoh.