genchem7

    Cards (20)

    • What is the first step to calculate percent composition?
      Determine the molar mass of the entire compound.
    • How do you determine the molar mass of a compound?
      By adding up the atomic masses of all the atoms in the compound using the periodic table.
    • What is the second step in calculating percent composition?
      Calculate the mass of each element.
    • How do you calculate the mass of each element in a compound?
      By multiplying the number of atoms of each element by its atomic mass.
    • What is the third step in calculating percent composition?
      Calculate percent composition.
    • What is the fourth step in calculating percent composition?
      Ensure that the sum of all the percentages is 100% (or very close, due to rounding).
    • What are the steps to calculate the empirical formula?
      1. Obtain the masses of each element (assume 100 g if given percentages).
      2. Convert masses to moles using atomic masses.
      3. Determine the simplest whole-number ratio by dividing by the smallest number of moles.
      4. Write the empirical formula using whole-number ratios as subscripts.
    • What is the first step to calculate the empirical formula?
      Obtain the masses of each element.
    • How do you convert masses to moles in the empirical formula calculation?
      By using the atomic mass of each element from the periodic table.
    • What is the third step in calculating the empirical formula?
      Determine the simplest whole-number ratio.
    • How do you determine the simplest whole-number ratio in the empirical formula calculation?
      By dividing the moles of each element by the smallest number of moles calculated.
    • What is the fourth step in calculating the empirical formula?
      Write the empirical formula.
    • How do you write the empirical formula?
      By using the whole-number ratios as subscripts in the formula.
    • What are the steps to calculate the molecular formula?
      1. Determine the empirical formula.
      2. Calculate the empirical formula mass.
      3. Determine the molar mass of the compound.
      4. Find the ratio of the molar mass to the empirical formula mass.
      5. Multiply the empirical formula by the ratio to get the molecular formula.
    • What is the first step to calculate the molecular formula?
      Determine the empirical formula.
    • How do you calculate the empirical formula mass?
      By adding up the atomic masses of all atoms in the empirical formula.
    • What is the third step in calculating the molecular formula?
      Determine the molar mass of the compound.
    • How do you find the ratio of the molar mass to the empirical formula mass?
      By dividing the molar mass by the empirical formula mass.
    • What is the fifth step in calculating the molecular formula?
      Multiply the empirical formula by the ratio.
    • What is the result of multiplying the empirical formula by the ratio?
      The result is the molecular formula.
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