Chemistry

• What is the used of chlorine gas 


  disinfecting pools
• What is the use of hydrogen gas

  Rocket fuel
• What is sodium hydroxide used for

  Bleach
• Copper


  Chemical element
• Oxide


  Chemical compound
• Barium


  Chemical element
• Aluminium


  Chemical element
• How do u work out mr

  the sum of the relative atomic masses of the atoms in the numbers shown in the formula
• Metal hydroxides


  Acid+ metal hydroxid-> salt+ water
• Metal oxide


  Acid+metal oxide-> salt+ water
• Metal carbonate


  Acid + metal carbonate-> salt +water
• metal+acid-> salt + hydrogen
• Ammonia+ acid


  Ammonium salt