At the site of gas exchange in the lungs, where does the oxygen move?

O2 moves from the alveoli to the white blood cells.
O2 moves from the white blood cells to the alveoli.
O2 moves from the alveoli to the red blood cells.
O2 moves from the red blood cells to the alveoli.

Achemistry student weighs out of phosphoric acid , a triprotic acid, into a volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with solution. calculate the volume of solution the student will need to add to reach the final equivalence point. round your answer to significant digits.

Which of the following statements is true about planck’s law

Nitrogen (n), phosphorus (p), and potassium (k) are the main nutrients in plant fertilizers. according to an industry convention, the numbers on the label refer to the mass percents of n, p2o5, and k2o, in that order. calculate the n: p: k ratio of a 30: 10: 10 fertilizer in terms of moles of each element, and express it as x: y: 1.0.