If a buffer solution is 0.540 m in a weak acid ( k a = 8.0 × 10 − 6 ) and 0.230 m in its conjugate base, what is the ph?

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest

What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees celsius to a solid at the same temperature? melting point of substance y = 35 degrees c; δhvaporization = 3.67 j/mol; δhfusion = 3.30 j/mol. mwsubstance y = 28.22 g/mol. −12.4 j −3.51 x 102 j 1.24 x 101 j 351 j

Describe the forces both attractive and repulsive that occur as two atoms move closer together.