chemistry 101

How many molecules of oxygen are produced from the decomposition of 8.75 g of hydrogen peroxide in the following equation Mg + H2O2 --> MgH2 + O2

options:

8.75 x 1024


6.02 x 1023


1.55 x 1022


5.27 x 1024


1.55 x 1023

  1. 👍 0
  2. 👎 0
  3. 👁 365
asked by ABCD
  1. Here is a worked example of a stoichiometry problem. Just follow the steps.
    http://www.jiskha.com/science/chemistry/stoichiometry.html

    1. 👍 0
    2. 👎 0
    posted by DrBob222
  2. 8.75/34.02 (molar mass of H2O2) = .257 mol H2O2

    Since the mol ratio b/t H2O2 and O2 is 1:1, there is also .257 mol O2

    .257 mol * 6.02 * 10^23 = 1.55 * 10^24 molecules so the 3rd option.

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    posted by Neha

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