States of Matter Overview

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Questions and Answers

What is the relationship between the partial vapour pressure of a component and the mole fraction of that component in solution according to Raoult’s law?

  • $p_i = p_i / x_i$
  • $p_i = p_i x_i$ (correct)
  • $p_i = p_i - x_i$
  • $p_i = p_i + x_i$

What is the standard atmospheric pressure in pascals?

  • 6894.76 Pa
  • 1.013 x 10^5 Pa (correct)
  • 105 Pa
  • 133.32 Pa

Which pressure unit is equivalent to 1 torr?

  • 133.32 Pa (correct)
  • 6894.76 Pa
  • 105 Pa
  • 1.013 x 10^5 Pa

What does the mole fraction represent in a solution?

<p>Number of moles of a component divided by the total number of moles of a solution (C)</p> Signup and view all the answers

How does vapor pressure influence the efficiency of deposition in the lungs from metered dose inhalers?

<p>Determines the aerosol droplet size (C)</p> Signup and view all the answers

What does Raoult’s law allow the calculation of from the composition of a solution?

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

Which statement is true about mole fraction?

<p>It is a unitless expression (A)</p> Signup and view all the answers

In an ideal solution, what is the relationship between partial vapor pressure and mole fraction according to Raoult’s law?

<p>$p_i = p_i xi$ (D)</p> Signup and view all the answers

What does the temperature of a substance measure?

<p>The average kinetic energy of its particles (C)</p> Signup and view all the answers

What quantity does vapor pressure determine in metered dose inhalers?

<p>Aerosol droplet size (C)</p> Signup and view all the answers

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