Questions asked by SourLemonn8

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• What exactly makes the creation of a vaccine against malaria difficult?
  
• A sealed beaker contains liquid Bromide, which has a brown color. We heat the beaker and after a while, the top of the beaker becomes brown. Then, the whole beaker becomes brown, until it stops. Why does the beaker become brown?
  
• Chemistry A/As Level question? HELP!