When an atom in a reactant gains electrons, what happens to its oxidation number? a. its oxidation number decreases, b. its oxidation number doubles, c. its oxidation number increases, d. its oxidation number increases by one, e. its oxidation number stays the same,

What are the percent by mass of copper in penny lab

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.

How many liters of ethylene glycol antifreeze (c2h6o2), with a density of 1.100 g/l, would you add to your car radiator containing 15.0 kg of water if you needed to protect your engine to - 21.5°c? for water, kf = 1.86°c m -1.