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)?

If a plot weight (in g) vs. volume (in ml) for a metal gave the equation y= 13.41x and r^2=0.9981 what is the density of the metal?

What is the relationship of air masses and the temperature of oceans?

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line