• This card is a reference to water. One molecule of water consists of with two hydrogen atoms and one oxygen atom (H2O).
    • Interestingly, the reactants in the experiment are liquids, but Hydrogen and Oxygen are gasses at room temperature.
  • A test tube and an Erlenmeyer Bulb are shown in this picture. Test tubes and Erlenmeyer Bulbs are commonly used in laboratories, where the H2O bonding would occur.

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