Question

Question #5a7e3

Answer 1

Mass is measured in grams. Scales are calibrated to read a mass, but not moles. The mass of an element is relative to the lightest element on the periodic table(hydrogen). Thus, we have the atomic masses of each element. We can convert a mass of a substance to moles to compare to other moles.

Explanation:

A mole is a general term we use to compare substances, similar to comparing dozens of items. When you hear a dozen somethings, you can think of a special number that represents a dozen (12 somethings=1 dozen somethings).

A mole is equivalent to `6.02` x `10^23` molecules.

A mole is equivalent to the molar mass of an element or molecule with a common unit: (`g`/`"mol"`).

A mole is equivalent to `22.4` `L` of a gas at STP(standard temperature and pressure or `273` `K` and `1` `atm`).

These equivalents are used in conversion problems.