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11 February, 12:17

How many grams of Hydrogen (H) would need to react with 190 grams of Fluorine (F) to make 200 grams of HF (Hydrofluoric Acid) ? Question 6 options: 200 20 10 5

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  1. 11 February, 12:52
    0
    20 its really simple actully

    all you do is take number it takes to get to 200 from 190 and double it
  2. 11 February, 15:00
    0
    Mol weight of HF = 1 + 19 = 20 g/mol HF

    200 g HF * (1 mol / 20 g HF) = 10 mol HF

    The stoichiometry is 1:1 for H:F

    So you need; 10 mol H & 10 mol F

    mol weight of H = 1 g/mol

    10 mol H * (1 g/mol) = 10 g H
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