Describe what a mole is,
and what is meant by
a molar solution.

A mole is an amount of a substance that contains 6.022✖️10^22 atoms of that substance

Or

Gram atomic masses,gram formula masses or gram formula masses are called one mole.

Molar solution or molarity is defined as the number of miles of so lutes dissolved per dm^3 of solution

Explanation:

I hope this will help you :)

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

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