Percent Composition (warning: boring video coming up)

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Percent Composition(warning boring video coming
up)
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(No Transcript)
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composition your turn

• Hydroxide makes up what percent of Calcium
  Hydroxide?
• Answer
• Ca(OH)2 74.1 g/mol
• 2 x 17.0g x 100 45.9
• 74.1g

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composition your turn

• Molex Enterprises has a crate containing 6022 kg
  of iron (III) oxide (also known as hematite). How
  many kilograms of iron can be recovered from the
  sample?
• Answer -
• Fe2O3 159.6 g/mole Fe is 111.6/159.6 x
  100
• 69.92 Fe
• 6022 Kg x 0.6992 4211 kg

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Hydrates

• Hydrates are substances that contain water within
  the crystalline structure of the compound.
• The water is not chemically bound it is trapped
  within the crystal.
• Ex. FeSO4 . 7H2O