Classify the following reaction in terms of energy:
NH4Cl(s) + energy → NH4+(aq) + Cl-(aq)

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?

What was bohr’s contribution to the planetary model

If an atom has 12 protons and 13 neutrons