mole concept

Question 1

define relative atomic mass

Answer 1

relative atomic mass of an element is the average mass of its atoms in the isotopic mixture, compared to 1/12 the mass of an atom of carbon-12

Question 2

define relative isotopic mass

Answer 2

relative isotopic mass of an isotope is the number of times the isotope is heavier than 1/12 the mass of an atom of carbon-12

Question 3

define relative molecular mass

Answer 3

relative molecular mass of a molecule is the average msas ofo that molecule compared to 1/12 the mass of an atom of carbon-12

Question 4

define relative formula mass

Answer 4

relative formula mass for ionic compounds is the sum of Ar of each element

Question 5

define Avogardo’s Law

Answer 5

states that equal volumes of all gases under the same conditions of temperature and pressure contain the same number of molecules/atoms

Question 6

define empirical formula

Answer 6

gives the simplest ratio of the number of atoms of each element present in the compound

Question 7

define molecular formula

Answer 7

gives the actual number of the number of atoms of each element present in the compound