mari asked in Science & MathematicsChemistry · 2 months ago

Help please? Show steps as well?

What mass of hydrogen atoms are in 185 g of zinc hydroxide: Zn(OH)2 (Mw. 99.43)?

1 Answer

  • KennyB
    Lv 7
    2 months ago
    Favorite Answer

    1)  Figure out how many moles of H you have.  Divide 185 by the molecular weight of Zn(OH)2.  Now multiply by 2 because there are 2 H's in even mole of Zn(OH)2  (Note:  answer is something short of 4 moles of H)

    2)  Now multiply by the atomic weight of H (about 1 g/mole).  So about 4 g of H

    3)  Remember to use at least three significant figures in all calculations.

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