mole & molar mass

Question 1

mole

Answer 1

amount of substance that has the same number of particles as the number of atoms in exactly 12g of carbon-12 isotope

Question 2

1 mole / avogadro’s number, Na

Answer 2

6. 02 x 10^23 particles

- particles can refer to atoms, molecules, ions, electrons, etc depending on the context

Question 3

atomic mass unit / amu

Answer 3

exactly 1/12 the mass of an atom of carbon-12

Question 4

1 amu

Answer 4

1.660539 x 10^-24 g

Question 5

how is Ar related to amu?

Answer 5

Ar = number of amu of the isotopes averaged / 1 amu

Question 6

molar mass definition

Answer 6

mass of 1 mole

Question 7

molar mass units and formula

Answer 7

g mol^-1 = mass of chemical (g) / number of moles of substance (mol)