Which condition is necessary for a mold fossil to form? The fossil must be preserved in amber. Minerals must replace the remains. The mold must be filled with sediment. Hard parts of the organism must dissolve.

Which statement describes james chadwick’s discovery.

Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?

3) in peaches, [oh]=3.16x10-11 m a) find [h+ ] b) what is the ph? c) is the solution acidic, basic, or neutral?