A sample of an unknown liquid is vaporized in a flask having a volume of 298 mL at 100.0°C. The vapor has a mass = 0.687 g, and exerts a pressure = 775 torr. Calculate the molecular weight of the unknown liquid.

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.

Many free radicals combine to form molecules that do not contain any unpaired electrons. the driving force for the radical–radical combination reaction is the formation of a new electron‑pair bond. consider the chemical equation. n(g)+no(g)⟶nno(g) n(g)+no(g)⟶nno(g) write lewis formulas for the reactant and product species in the chemical equation. include nonbonding electrons. n(g)n(g) select draw rings more erase select draw rings more erase select draw rings more erase n no(g)