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2. how do you make cement

  • cement powder + water
  • cement powder + water + sand
  • cement powder + water + sand + aggregate

3. calcium oxide + ____ --> calcium hydroxide

  • water
  • oxygen
  • hydrogen

4. how do you make mortar

  • cement powder + water
  • cement powder + water + sand
  • cement powder + water + sand + aggregate

5. limewater goes _____ if carbon dioxide is present

  • cloudy
  • milky
  • clear
  • opaque
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