C2 Atoms, Molecules, Stoichiometry

Question 1

unified atomic mass unit

Answer 1

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

Question 2

relative atomic mass

Answer 2

average mass of an atom relative to the unified atomic mass unit

Question 3

relative isotopic mass

Answer 3

mass of an isotope relative to the unified atomic mass unit

Question 4

relative molecular mass

Answer 4

mass of a molecule relative to the unified atomic mass unit

Question 5

relative formula mass

Answer 5

mass of a formula unit relative to the unified atomic mass unit

Question 6

diff between RMM and RFM?

Answer 6

RMM is for covalent molecules and RFM is for ionic compounds

Question 7

how to determine relative atomic mass from isotopic mass?

Answer 7

multiply each isotopic mass by its abundance, add all values together and divide by total abundances (in questions where they give u a mass spectrometry, isotopic mass is the m/e)

Question 8

Avogadro constant

Answer 8

6.022 x 10^23

Question 9

empirical formula

Answer 9

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

Question 10

molecular formula

Answer 10

total number of atoms of each element present in a molecule