Equations

Question 1

The formula to work the amount of atoms

Answer 1

Moles x 6.02x10 to the power of 23

Question 2

How to work out moles

Answer 2

Mass / Mr

Question 3

How to work out mass

Answer 3

Moles x Mr

Question 4

How to work out volume ( dm3) at RPT

Answer 4

Moles x 24dm3

Question 5

How to work out volume (cm3) at RPT

Answer 5

Moles x 24000cm3

Question 6

Formula for the ideal gas equation

Answer 6

Pressure(Pa) x volume(m3) = moles x R(8.314) x Temperature(K)

Question 7

How to convert KPa to Pa

Answer 7

x1000

Question 8

How to convert Celsius to K

Answer 8

+ 273

Question 9

Converting volumes

Answer 9

cm3 to dm3 = divide by 1000
dm3 to m3 = divide by 1000
m3 to dm3 = x 1000
dm3 to cm3 = x 1000
cm3 to m3 = x10 to the power of -6
m3 to cm3 = x10 to the power of 6

Question 10

How to work out concentration

Answer 10

Moles/ Volume (dm3)

Question 11

How to work out moles using concentration and volume

Answer 11

concentration x volume(dm3)

Question 12

Formula for percentage uncertainty

Answer 12

uncertainty/ measurement then x answer by 100

Question 13

Formula for percentage yield

Answer 13

actual mass/ theoretical mass then x the answer by 100

Question 14

Formula for atom economy

Answer 14

sum of Mr of desired products/ sum of Mr of all products the x the answer by 100

Question 15

How to work out relative atomic mass

Answer 15

(mass of isotope x %) + …/ 100