Hannahmiller
Answered

  1. Balance the following chemical equation: Fe + O2 → Fe2O3 What is the coefficient on Fe, O2 and Fe2O3? 

    a. 1, 2, 3

    b. 4, 3, 2

    c. 1, 3, 1

    d. 2, 1, 1

    20. The law of conservation of mass lets us know that in every chemical equation you have to have the same number of ________ on both sides of the equation. 

    a. moles

    b. coefficients

    c. atoms of each element

    d. molecules

Verified Answer :

Sophia264
  1. Fe + O2 → Fe2O3

    Balanced: 4Fe + 3O2 → 2Fe2O3

    The answer would be b (4,3,2).

    2. c (atoms of each element)

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