What is Hess's law?
The enthalpy change in a reaction is independent of the route taken.
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3.786g of hydrated zinc sulphate, ZnSO4•xH2O, is heated to remove all water of crystallisation. The mass of anhydrous ZnSO4 formed is 2.122g. What is the formula of the hydrated zinc sulphate?
State and explain the difference in base strength between phenylamine and ammonia.
Which element, Na or Mg is likely to have the higher melting point? Give reasons for your choice