amounts of substance

Question 1

what is the equations linking moles , volume and concentration

Answer 1

moles= concentration x volume

Question 2

what is the equation for percentage yield

Answer 2

actual yield/theoretical yield x 100

Question 3

what is the equation linking mass, MR and moles

Answer 3

moles= mass/Mr

Question 4

what is the equation for atom economy

Answer 4

atom economy= desired reactants/all reactants x 100

Question 5

equation linking moles, avagadros constant and number of partivles

Answer 5

number of particles= moles x avagadros constant

Question 6

what is the ideal gas equation and units

Answer 6

pV=nRT
p- pascals
V- metres cubed
n- moles
R- ideal gas constant
T- K

Question 7

how do you convert celcius to kelvins

Answer 7

+273

Question 8

how do you convert kPa to Pa

Answer 8

x1000

Question 9

how do you convert from cm cubed to metres cubed

Answer 9

divide by 1,000,000

Question 10

what are the economic advantages of have a high atom economy

Answer 10

Economic advantages- the company have less waste to deal with which costs money to dispose of safely

stops a lot of money being wasted on by products

Question 11

what are the moral advantages of having a high atom economy

Answer 11

Cheaper to make products so medicines can be cheaper which means they are more available to people

Question 12

what are the environmental advantages of having a high atom economy

Answer 12

Processes that use fewer raw materials and produce less waste are better for the environment.

Tends to be more sustainable than using a low atom economy processes.

Question 13

how do you calculate empirical formula

Answer 13

1. work out how many moles of each element you have
2. divide each molar value by the smallest molar number
3. apply numbers from the ratio to the formula and if they arent near whole numbers multiply them up