If the freezing point of a substance is 68°C, what is its melting point?

How do you know when a chemical reaction has occurred

Write a balanced equation showing the formation of copper (ii) nitrite from its elements

The size (radius) of an oxygen molecule is about 2.0 ×10−10m. make a rough estimate of the pressure at which the finite volume of the molecules should cause noticeable deviations from ideal-gas behavior at ordinary temperatures (t= 300k ). assume that deviatons would be noticeable when volume of the gas per molecule equals the volume of the molecule itself.