D. Unnlary 9. In science class, Rupert learns about the diferent systems of the human body. One of the
systems is shown in the folowing illustration.
A Gas exchange, digestion, and development
B. Waste removal, regulation, and stimull response
C. Removal of bacteria and viruses, blood transportation, and
movement
D. Support, protectlon, and movement

In numbering carbon atoms in the parent chain of a hydrocarbon, why would you number from right to left, rather than left to right

Which of these conditions most likely produces an unstable isotope?

There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. in the first step, calcium carbide and water react to form acetylene and calcium hydroxide: cac2 (s) + 2h2o (g) → c2h2 (g) + caoh2 (s) =δh−414.kj in the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6c2h2 (g) + 3co2 (g) + 4h2o (g) → 5ch2chco2h (g) =δh132.kj calculate the net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide from these reactions. round your answer to the nearest kj .