Equations For Amount Of Substance

Question 1

Moles =

Answer 1

Mass (g) / MR

Question 2

Concentration =

Answer 2

Number of moles/ volume (dm3)

Question 3

What is the multiplication factor to get from cm3 to m3?

Answer 3

Divide by a million

Question 4

What is the multiplication factor to get from dm3 to m3?

Answer 4

Divide by 1000

Question 5

Moles in solution =

Answer 5

Concentration (moldm-3) x volume (dm3) / 1000

Question 6

Pressure x volume =

Answer 6

Number of moles x gas constant x temperature

Question 7

Atom economy =

Answer 7

Mass of desired product/ total mass of reactants (x100)

Question 8

Yeild =

Answer 8

Number of moles of specified product / max theoretical amount
(Can also be expressed in g)

Question 9

What unit is pressure measured in in the ideal gas equation?

Answer 9

Pa, pascals

Question 10

What is volume measured in in the ideal gas equation?

Answer 10

m3, metres cubed

Question 11

What is temperature measured in in the ideal gas equation?

Answer 11

K, kelvin

Question 12

How do we get from Celsius to kelvin?

Answer 12

+ 273

Question 13

What should you do with the the term nRT?

Answer 13

Keep it together, if it ends up separated, you’ve rearranged wrong unless you’re rearranging for n

Question 14

Where do you find PV when rearranging for n?

Answer 14

At the top

Question 15

Relative atomic mass =

Answer 15

Average mass of one atom of element/ 12 mass of 1 atom of 12C

Question 16

When volume isn’t in m3 (ideal gas equation) what unit is it in?

Answer 16

dm3