Why do different parts of the world have such different animals?

What is the mass of phosphorous in a 51-kg person

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

Use the half-reactions of the reaction au(oh)3 + hi -> au +i2 +h2o to answer the questions