Compare the amount of heat required to vaporize a 200.-gram sample of h2o(ℓ) at its boiling point to the amount of heat required to melt a 200.-gram sample of h2o(s) at its melting point.

A__ is two or more substances that are together in the same place but are not chemically combined

Both josef loschmidt and amedeo avogadro contributed to our understanding of basic molecular numbers, sizes, and reaction ratios. neither scientist discovered “avogadro’s number” in the form we use it today (6.02 x 10 23). still, there’s a controversy over the name. research the contributions from these two scientists and read about how avogadro’s number got its name. briefly state what you think this number should be called, providing key details of each scientist’s contributions to this concept and a solid rationale for your case in naming the number.

What shape would a molecule with two bound groups and two lone pairs have?