What are pure substances?

Question

This is for a science project :)

could someone also give me some example :). Thx

Answer 1

Pure substances contain only one kind of fundamental particle, such as an atom, a molecule, or an ionic combination. Elements and compounds are pure substances. Compounds can be molecular, like water and sucrose (sugar), or ionic, like sodium chloride (common salt).

Answer 2

A substance is anything, element or compound. A pure substance is some volume or mass of the substance that has only the stated substance and nothing else.

In the real world something that is 99.97 % the stated substance is considered chemically pure, abbreviated c.p or q.p.. There are a few applicaction where c.p. is not clean or pure enough (carbon in nuclear piles, for example) but 99.97 is very very clean.

Answer 3

A pure substance has a fixed boiling and melting/freezing point at a particular pressure. For example, pure water boils at 100C and freezes at 0C at atmospheric pressure. These temperatures will vary slightly if the pressure changes. Also, pure substances have sharp cooling curves. Meaning, you can find out the boiling and melting/freezing point by looking at the curve/graph. Impure substances like wav have varying boiling and melting/freezing points

Answer 4

substance made of only one kind of material having definite properties throughout. AKA a substance that is not a mixture of things, or a substance containing a pure chemical, without any other components.

Answer 5

Substances that can't be broken down any further. What is left would be an atom.

Answer 6

see the elements in the chart

Answer 7

100%.

Answer 8

isn't it something that cont be broken down into different elements or something