Which of the following statements BEST describes a mixture? A
Carbon dioxide is an example of a heterogeneous mixture.
B
A compound and a mixture are the same type of substance.
с
Two elements that are in the area but not chemically combined can be a mixture.
D
A mixture is unable to be separated because the molecules have been chemically combined.

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.

If the concentration of phosphate in the cytosol is 2.0 mm and the concentration of phosphate in the surrounding fluid is 0.1 mm, how could the cell increase the concentration of phosphate in the cytosol? a) passive transportb) diffusionc) active transportd) osmosise) facilitated diffusion

Areaction is first order with respect to reactant x and second order with respect to reactant y. which statement describes the rate law for this reaction?