2 atoms, molecules and stoichiometry

Question 1

unified atomic mass unit

Answer 1

1/12 of the mass of a carbon-12 atom

Question 2

relative atomic mass(Ar)

Answer 2

the ratio of the average mass of an atom compared to the unified atomic mass unit

Question 3

relative isotopic mass

Answer 3

the mass of an particular atom of an isotope compared to the unified atomic mass unit value

Question 4

relative molecular mass(Mr)

Answer 4

the weighted average mass of a molecule compared to 1/12 the mass of an atom of carbon -12

Question 5

relative formula mass

Answer 5

the weighted average mass of one formula unit compared to the value of unified atomic mass unit

Question 6

mole

Answer 6

the amount of substance which contains 6.02x10 23 specified particles

Question 7

empirical formula

Answer 7

the simplest whole number ratio of an element present in one molecule or one formula unit of the compound

Question 8

molecular formula

Answer 8

the formula that shows the number and the type of each atom in a molecule