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Test Your Chemical Equation Balancing Skills
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Test Your Chemical Equation Balancing Skills

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Questions and Answers

Which of the following is NOT a method for balancing chemical equations?

  • Adding or removing reactants or products
  • Adding or removing charges (correct)
  • Changing the subscripts of the reactants or products
  • Adjusting coefficients

    • What is the first step in balancing a chemical equation?

  • Counting the number of atoms of each element on both sides
  • Identifying the products
  • Adjusting coefficients
  • Identifying the reactants (correct)

    • What is the purpose of balancing a chemical equation?

  • To ensure that the equation is written in the correct order
  • To ensure that the number of atoms of each element on both sides is equal (correct)
  • To ensure that the equation is written in the correct format
  • To ensure that the equation is chemically stable

    • What is the coefficient of oxygen in the balanced equation for the combustion of methane?

    <p>2</p> Signup and view all the answers

    What is the coefficient of hydrogen in the balanced equation for the reaction between potassium permanganate and hydrogen peroxide?

    <p>3</p> Signup and view all the answers

    What is the coefficient of nitrogen in the balanced equation for the Haber process?

    <p>4</p> Signup and view all the answers

    What is the mass of oxygen needed to react completely with 1.5 moles of aluminum in the following balanced equation? 4Al + 3O2 -> 2Al2O3

    <p>90 g</p> Signup and view all the answers

    What mass of sodium chloride is produced from 2.5 moles of sodium reacting with excess chlorine gas in the following balanced equation? 2Na + Cl2 -> 2NaCl

    <p>358 g</p> Signup and view all the answers

    What mass of phosphoric acid is needed to react completely with 75 g of calcium hydroxide in the following balanced equation? 3Ca(OH)2 + 2H3PO4 -> Ca3(PO4)2 + 6H2O

    <p>45.0 g</p> Signup and view all the answers

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