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Hydrates Original Scenario-Based Practice

Chemistry · The Mole & Stoichiometry · Chemistry · The Mole

1 Chemistry practice questions on Hydrates. Questions built around original scenarios.

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Questions

  1. 1.

    A planetary exploration rover on Mars collects a 4.93 g sample of a glistening crystal identified as a hydrate of magnesium sulfate, MgSO4⋅xH2O\text{MgSO}_4 \cdot x\text{H}_2\text{O}. The rover's onboard thermal analyzer heats the sample to constant mass, leaving behind 2.41 g of anhydrous MgSO4\text{MgSO}_4 after all water of crystallization is driven off. Given the molar masses of MgSO4\text{MgSO}_4 (120.4 g/mol) and H2O\text{H}_2\text{O} (18.0 g/mol), what is the value of xx in the hydrate's empirical formula?

    • A) 2
    • B) 4
    • C) 5
    • D) 7

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