The fastest dolphin swam from the coast of Virginia directly north toward the coast of Maryland for 112 miles in 2 hours. What was the average velocity of the dolphin?

One of the cell membrane's functions is to protect the cell keep wastes in the cell create new cells keep light out of the cell

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)