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Moles and chemical formulae, Chemical formulae - Coggle Diagram

- - - - 1 mole of nitrogen is 14g
      - 1 mole of sodium is 23 g
- - - - Q=m x c x T
      - c= specific heat capacity ( J/g/°C)
        
        T=temperature change (Cº)
        
        m= the mass of the substance being heated(g)
        
        Q= heat energy change(J)
  - - - ΔH= Q/n
      - mass of fuel burned(mol)
        
        energy released per gram(Kj/mol)
        
        Q= energy released(Q)
- - - - Find out the moles of the known substance (moles =mass /Mr
        
        3.Find the moles of the unknown substance (using the molar ratio from the balanced equation)
        
        4.Find the mass of the unknown substance (mass = moles x Mr)
- - - - this is because of things like
        
        reactants being left behind in equipment
        
        side reactions happening with air or with an impurity in reactants
        
        lost during transfer between containers
        
        The reaction may be reversible and in these reactions a high yield is never possible as the products are continually turning back into the reactants
  - - - percentage yield = actual yield / theoretical yield x 100
- - - - Get the masses of each element
        
        Find the moles of each one using moles=Mass/molar mass
        
        3.Find the simplest ratio between the elements by dividing by the lowest number
        
        Write the ratio into the empirical formula