C4
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How to calculate relative atomic mass
Practice questions
What is avogardos constant number
6.02 x 10 to the power of 23
What is the equation for moles
Mass ——— Rfm
What is the limiting reactant
The reactant that gets used up first in a reaction
What does percentage yield do
Compares the amount made with the maximum amount that could be made
Give 2 example of factors affecting percentage yield
Product being left in apparatus Reversible reactions not completing
How do you calculate percentage yield
Mass of product ———————— x100 Theoretical mass
How to calculate atom economy
Rfm desired products ———————- x 100 rfm reactants
What are concentrations measured in
g/dm cubed
How to work out concentration
Mass of solute (g) ————————- Volume of solution (dm3)
What do you do if you are working out concentration using cm
Divide by 1000
How else should I revise c4?
PRACTICE QUESTIONS
What is atom economy
is a measure of the amount of starting materials that ends up as useful products
How does greater atom economy benefit us
Save money Increased sustainability
what is the equation for number of moles in a gas
volumer of gas / 24dm
why is the relative atomic mass of some elements not always a whole number
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.