3.1 Amount of substance and the mole

Question 1

what one mol

Answer 1

6.02x10^23 particles - this is the number of atoms in 12g of C12

Question 2

what is the mass of one mole of atoms of an element equal to

Answer 2

the Mr in grams

Question 3

what is the equation for mass using amount of substance and molar mass

Answer 3

mass = amount of substance x molar mass

Question 4

draw the equation triangle for mass, molar mass and amount of substance

Answer 4

mass on top
amount of sub on left
molar mass on right

Question 5

what is equal to the molar mass in grams

Answer 5

is equal to the relative atomic mass in grams

Question 6

unit for molar mass

Answer 6

gmol^-1

Question 7

how do you calculate the number moles using mass and molar mass

Answer 7

moles = mass / molar mass 
n= m/M

Question 8

calculate the amount of substance in moles of 6g of HF

Answer 8

3.3

Question 9

calculate the amount of substance in moles of 220g of N20

Answer 9

0.2

Question 10

calculate the amount of substance in moles of 1.14g of Cr2O3

Answer 10

133.3