Mastering Molar Mass
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Questions and Answers

Which of the following is the basis for many types of combustion calculations?

  • Flue gas analysis
  • Molar mass (correct)
  • Excess air
  • Basic chemistry principles

What is the purpose of using simple tables in combustion calculations?

  • To understand combustion theory
  • To check over molar and mass balances
  • To tackle complex combustion problems
  • To organize the data (correct)

Which of the following is examined in the chapter on flue gas analysis?

  • Traditional fuel types
  • Combustion efficiency (correct)
  • Emerging fuel types
  • Boiler combustion control

Which unit is used to express atomic mass and molecular mass?

<p>Atomic mass unit (AMU) (B)</p> Signup and view all the answers

What is Avogadro's number?

<p>6.022 x 10^23 particles (C)</p> Signup and view all the answers

What is the atomic mass of boron?

<p>10.811 (C)</p> Signup and view all the answers

What is the molar mass of sulfur?

<p>32 g/mol (B)</p> Signup and view all the answers

Which of the following is true about the coefficients in a chemical equation?

<p>They represent the number of moles in each compound. (B)</p> Signup and view all the answers

What is the coefficient for propane (C3H8) in the balanced combustion equation?

<p>1 (A)</p> Signup and view all the answers

Which law states that all substances combine in accordance with simple, definite weight relationships?

<p>Law of Combining Weights (B)</p> Signup and view all the answers

What is the balanced equation for the combustion of methane (CH4)?

<p>CH4 + 2O2 -&gt; CO2 + 2H2O (D)</p> Signup and view all the answers

According to the ideal gas equation, what is the relationship between pressure (P), volume (V), and temperature (T)?

<p>PV = mRT (D)</p> Signup and view all the answers

According to Dalton's Law, what is the relationship between the total pressure (PT) and the partial pressures of the constituents (P1, P2, P3) in a mixture of gases?

<p>PT = P1 + P2 + P3 (A)</p> Signup and view all the answers

According to Avogadro's Law, what is the relationship between equal volumes of gases at the same temperature and pressure?

<p>They have the same number of molecules (B)</p> Signup and view all the answers

What is the general equation for a complete combustion reaction?

<p>Fuel + O2 -&gt; CO2 + H2O (C)</p> Signup and view all the answers

Which substances in the equation combine in simple whole number kilomoles?

<p>CH4 and CO2 (D)</p> Signup and view all the answers

What is the mass of the reactants (CH4 and O2) in the combustion of methane?

<p>64 kg (D)</p> Signup and view all the answers

What is the mass of carbon dioxide (CO2) produced when 1 kmol of methane (CH4) is burned?

<p>44 kg (D)</p> Signup and view all the answers

If 176 kg of propane (C3H8) is burned, what is the mass of water vapor (H2O) produced?

<p>352 kg (C)</p> Signup and view all the answers

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