What are reactan?

What energy profile best shows that the Hf of H2S is -20.6 kJmol? What does geotropism cause a plants roots to do? What are 3 terms used to describe organisms such as cows? You are caught in severe weather while boating. Where should you seat your passengers? Can isotopes have he same atomic number? Why do you consider Pluto a dwarf planet now? Distinguish between substances that the cardiovascular system transports to cell and substances that it transports away from cells? How long will a 12v 2.5ah battery run a 3w LED? What are Wallace's contribution to natural selection? Is a decrease or increase in CO2 in the blood the chemical stimulus that causes the cessation of breath holding? What is one isotope for barium? A man enters a field when he enters a field he dies because he forgot something in his back pack What did he forget? What is the type of reaction in which the gain of an electron takes place? What is the ridge on the dorsal surface of the shoulder blade called? Why are there coloration differences in the ventral and dorsal surfaces of the forearm and hand? What happened to Ceres in 2006? Is a manta ray a carnivore herbivore or omnivore? Which selection technique is most likely to introduce bias? Which country does NOT lie on the prime meridian? Is graphite a mixture or metallic element?