chemistry

a 5.00g sample of a hydrate of barium chloride was heated, and only 4.30g of the anhydrous salt remained. what is the formula of the hydrate?

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  1. how many moles of BaCl2 is in 4.3g?
    how many moles of H2O is in .70g?

    now look at the ratio. If there were 7 times as many moles of water as BaCl2, the formula would have been BaCl2.7H2O

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    bobpursley
  2. thanks!!

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