What sort of mechanism is used during monobromination of benzene?

Electrophilic Substitution

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Lead (IV) oxide reacts with concentrated hydrochloric acid as follows: PbO2(s) + 4HCl(aq) -----> PbCl2(s) + Cl2(g) + 2H2O(l) What mass of lead chloride would be obtained from 37.2g of PbO2, and what mass of chlorine gas would be produced


Explain why Silicon Dioxide has a higher melting point than Sulfur Trioxide.


Why do transition metals form coloured compounds?


A) What assumptions are made about ideal gases. B) if 14g of an ideal gas is added to a 4 dm3 container at 210Kpa pressure and a temperature of 40oc how many moles were added and suggest the identity of the gas.