Asample that cannot be seperated into 2 or more substances by physical means is

The answer is a pure substance.

Pure substance can also be divided into compounds or elements, they both cannot be separated by physical methods. And elements, cannot be further separated by chemical methods. Physical methods may include distillation, crystallization, evaporation etc.

Compunds are made up of 2 or more elements chemically combined together, though it can be separated using chemical methods such as heat or electricity.

But as these both compounds and elements cannot be separated by physical methods, they're called pure substance. Unlike mixtures, which can be separated using physical methods.

If the water vapor content stays the same and the temperature drops, then the relative humidity increases. its vise versa.if the water vapor content stats the same and the temperature rises, the relative humidity decreases. so, yes, i'd say that temperature and humidity have a strong relationship.

Adozen is 1221/12 = 1.751.75 x 12 = 21therefore, 1.75 is the answer.