1) Qual é a massa de NaOH contida em 1 Kg de solução a 45% em massa. Sabendo que sua densidade é 1,5 gmL-1
, qual sua concentração em quantidade de matéria (mol/L)?

Avolleyball player hit a ball with a mass of 0.25 kg. the average acceleration of the ball is 15.5 m/s². how much force did the volleyball player apply to the ball? 62.0 n 3.87 n 62.0 m/s² 3.87 m/s²

Carbon-14 undergoes radioactive decay in the reaction above. determine the type of radiation emitted in this reaction and describe what is happening to the nucleus during this reaction.

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.