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C3 revision Chemistry - Coggle Diagram
C3 revision Chemistry
Conservation of mass
What is conservation of mass
The law of conservation of mass is loosing no atoms during a chemical reaction
Mass change equation
mass at start takeaway mass at end
Calculating Ar
Atomic mass
Number of protons and neutrons
Calculating mr
Relative formula mass
MgO=24+16=40
Rule of balancing equation
Only place big numbers in front of symbols
Mg+O2--> MgO
2Mg +O2--> 2mgO
Moles
Equation for moles
Number moles= mass (g) divided by Mr
One of mass of atom is equal to it's mr
One mole = 6.02 x 10 to the power of 23
Percentage yield
Equation
Percentage yield=( actual yield divided by theoretical yield) x 100