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Washing soda, a compound used to prepare hard water for washing laundry, is a hydrate, which means that a certain number of water molecules are included in the solid structure. its formula can be written as na₂co₃⋅xh₂o, where x is the number of moles of h₂o per mole of na₂co₃. when a 3.837 −g sample of washing soda is heated at 25 ∘c, all the water of hydration is lost, leaving 1.42 g of na₂co₃.
what is the value of x?
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