Una solución reguladora se prepara mezclando 20 ml de acetato de sodio al 0,10 F con 22 ml de
CH3COOH
Calcule el pH y pOH de esta solución.
al 0,12 F Ka: 1,8 x 10–5
Calcule el cambio del pH causado por la adición de 5 ml de HCl al 0,10 F.

Complete each row of the table below by filling in the missing prefix or missing exponent.

Select the correct value for the indicated bond angle in each of the compounds. o−o−oo−o−o angle of o3 90° 109.5° < 109.5° 120° < 120° 180° f−b−ff−b−f angle of bf3 180° < 109.5° < 120° 120° 109.5° 90° f−o−ff−o−f angle of of2 < 120° 120° 90° 109.5° 180° < 109.5° cl−be−clcl−be−cl angle of becl2 90° 109.5° 180° 120° < 109.5° < 120° f−p−ff−p−f angle of pf3 90° 109.5° < 109.5° 180° 120° < 120° h−c−hh−c−h angle of ch4 90° < 109.5° 180° 120° < 120° 109.5°

A0.100-kilogram apple hangs in a tree 1.50 meter above the ground. ignore frictional effects, the total mechanical energy of the apples is