C4.1/C4.2 - Relative mass and moles

Question 1

Relative atomic mass

Answer 1

-aka Ar
-unit = grams
-masses of atoms compared by measuring Ar of carbon -12

Question 2

Mr

Answer 2

-grams
-Ar of compounds

Question 3

mole

Answer 3

-unit for amount of substance in Ar
-formula mass of substance
-grams

Question 4

Avogardo’s constant

Answer 4

• 6.022 x 10 to the power of 23

Question 5

Equation involving moles/mass/Mr

Answer 5

moles = mass/Mr

Question 6

Balanced symbol equations relation to moles

Answer 6

-tell you number of moles of substance in reaction

Question 7

Avogadros constant refers to

Answer 7

Number of atoms per mole
Or in a compound number of molecules per mole

Question 8

Number of atoms using avogadros constant

Answer 8

avogadros constant x amount of moles

Question 9

Number of atoms in a compound in an amount of moles using avogadros constant

Answer 9

Molecules num = avogadros constant x amount

Ans x number of atoms in compound