C4

Question 1

How to calculate relative atomic mass

Answer 1

Practice questions

Question 2

What is avogardos constant number

Answer 2

6.02 x 10 to the power of 23

Question 3

What is the equation for moles

Answer 3

Mass
———
Rfm

Question 4

What is the limiting reactant

Answer 4

The reactant that gets used up first in a reaction

Question 5

What does percentage yield do

Answer 5

Compares the amount made with the maximum amount that could be made

Question 6

Give 2 example of factors affecting percentage yield

Answer 6

Product being left in apparatus
Reversible reactions not completing

Question 7

How do you calculate percentage yield

Answer 7

Mass of product
———————— x100
Theoretical mass

Question 8

How to calculate atom economy

Answer 8

Rfm desired products
———————- x 100
rfm reactants

Question 9

What are concentrations measured in

Answer 9

g/dm cubed

Question 10

How to work out concentration

Answer 10

Mass of solute (g)
————————-
Volume of solution (dm3)

Question 11

What do you do if you are working out concentration using cm

Answer 11

Divide by 1000

Question 12

How else should I revise c4?

Answer 12

PRACTICE QUESTIONS

Question 13

What is atom economy

Answer 13

is a measure of the amount of starting materials that ends up as useful products

Question 14

How does greater atom economy benefit us

Answer 14

Save money
Increased sustainability

Question 15

what is the equation for number of moles in a gas

Answer 15

volumer of gas / 24dm

Question 16

why is the relative atomic mass of some elements not always a whole number

Answer 16

it takes into account the proportions of any isotopes of the element. so it is the mean RAM of atoms of an element compared with the standard carbon atom.