When K 2 Cr 2 O 7 is cooled from 80°C to 20°C , how much solute will precipitate out of the solution? a.12g
b.46g
c.20g
d.58g

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

Scientists have developed an explanation of a phenomenon from several verified hypotheses. the explanation has been confirmed through numerous experimental tests.which option best describes this explanation? a. scientific lawb. research questionc. hypothesisd. scientific theory

Aparticular radioactive nuclide has a half-life of 1000 years. what percentage of an initial population of this nuclide has decayed after 3500 years?