Stoichiometry in Medicine
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Questions and Answers

What is stoichiometry?

  • The study of the behavior of gases under varying temperature and pressure
  • The study of the physical and chemical properties of elements
  • The calculations of the quantities in chemical reactions based on a balanced equation (correct)
  • The process of measuring the volume of reactants in a chemical reaction

    • What is the molar mass of water (H2O)?

  • 20.007 g/mol
  • 22.990 g/mol
  • 18.015 g/mol (correct)
  • 36.031 g/mol

    • What is the molar mass of barium nitrate (Ba(NO3)2)?

  • 153.33 g/mol
  • 197.32 g/mol
  • 261.34 g/mol (correct)
  • 309.28 g/mol

    • What is the molar mass of ammonium chromate ((NH4)2CrO4)?

    <p>152.06 g/mol</p> Signup and view all the answers

    What does a chemical equation of a chemical reaction include?

    <p>Molecular formulae of reactants and products, phases, and stoichiometry</p> Signup and view all the answers

    What do the coefficients in a balanced chemical equation represent?

    <p>Proportions of each substance</p> Signup and view all the answers

    In a balanced chemical equation, what must be equal on both sides?

    <p>Number of elements and net charges</p> Signup and view all the answers

    What does the conservation of mass state in a balanced chemical equation?

    <p>Mass cannot be created or destroyed, and the number of elements should be the same on both sides</p> Signup and view all the answers

    What do moles provide a bridge from in stoichiometry?

    <p>Molecular scale to the real-world scale</p> Signup and view all the answers

    What are the steps to calculate stoichiometric problems?

    <p>Correctly balance the equation, convert the given amount to moles, set up mole ratios, use mole ratios to calculate moles of desired chemical, convert moles back into final unit</p> Signup and view all the answers

    How many moles of O2 are produced when 3.34 moles of Al2O3 decompose?

    <p>5.01 moles</p> Signup and view all the answers

    How many moles of Al are produced when 430 g of Al2O3 decompose?

    <p>8.44 moles</p> Signup and view all the answers

    How many moles of Al are produced when 6.11 moles of O2 are produced?

    <p>8.15 moles</p> Signup and view all the answers

    How many moles of C2H2 are needed to produce 8.95 moles of H2O in the reaction 2C2H2 + 5 O2 4CO2 + 2 H2O?

    <p>17.9 moles</p> Signup and view all the answers

    If 2.47 moles of C2H2 are oxidized, how many moles of CO2 are formed in the reaction 2C2H2 + 5 O2 4CO2 + 2 H2O?

    <p>4.94 moles</p> Signup and view all the answers

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