Chapter 5: Gases
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Questions and Answers

What is the ideal gas law equation?

  • P1V1 = P2V2
  • V1 = V2
  • PV = nRT
  • P1V1 n1T1 = P2V2 n2T2 (correct)

What is the temperature in Kelvin when the temperature in Celsius is 25°C?

  • 348 K
  • 323 K
  • 298 K (correct)
  • 248 K

What is the volume of 49.8 g of HCl at STP?

  • 50.7 L
  • 30.7 L (correct)
  • 20.7 L
  • 40.7 L

What is the final pressure of argon in the lightbulb?

<p>1.48 atm (A)</p> Signup and view all the answers

What happens to the volume of a gas when its temperature is increased, while its pressure remains constant?

<p>It increases (B)</p> Signup and view all the answers

What is the volume of the balloon when the temperature in the car reaches 90°C?

<p>2.38 L (C)</p> Signup and view all the answers

What is the new volume of air trapped in the tube?

<p>0.0105 L (A)</p> Signup and view all the answers

What is the volume of the balloon when the temperature in the car reaches 90°C?

<p>2.45 L (B)</p> Signup and view all the answers

What is the pressure of O2 in the steel tank?

<p>Cannot be determined with the given information (A)</p> Signup and view all the answers

What happens to the volume of a gas when its pressure is increased, while its temperature remains constant?

<p>It decreases (D)</p> Signup and view all the answers

What is the relationship between the pressure and temperature of a gas?

<p>Directly proportional (B)</p> Signup and view all the answers

What is the volume of the helium-filled balloon at the top of Mt. Hood, Oregon’s highest mountain?

<p>Cannot be determined with the given information (B)</p> Signup and view all the answers

What is the relation between volume and pressure of a gas at constant temperature?

<p>Volume is inversely proportional to pressure (C)</p> Signup and view all the answers

What is the pressure of the chlorine gas in mmHg if the volume is reduced from 946 mL to 154 mL at constant temperature?

<p>1452 mmHg (C)</p> Signup and view all the answers

What is the unit of pressure that is equivalent to 760 mmHg?

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

What is the relation between volume and temperature of a gas at constant pressure?

<p>Volume is directly proportional to temperature (B)</p> Signup and view all the answers

What is the relationship between the volume of a gas and its temperature at constant pressure?

<p>The volume of the gas decreases as the temperature decreases (D)</p> Signup and view all the answers

What is the pressure of the CO2 gas in atmospheres?

<p>0.3834 atm (C)</p> Signup and view all the answers

What is the formula to convert Celsius to Kelvin?

<p>T (K) = t (°C) + 273.15 (A)</p> Signup and view all the answers

What is the state of matter characterized by a fixed volume and a fixed shape?

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

What is the relationship between the volume of a gas and the number of moles of the gas at constant temperature and pressure?

<p>The volume of the gas is directly proportional to the number of moles (A)</p> Signup and view all the answers

What is the standard molar volume of an ideal gas at STP?

<p>22.4141 L (A)</p> Signup and view all the answers

What is the value of the universal gas constant R in atm·L/mol·K?

<p>0.0821 atm·L/mol·K (B)</p> Signup and view all the answers

What is the equation that relates the volume of a gas to the number of moles of the gas, the temperature, and the pressure?

<p>PV = nRT (B)</p> Signup and view all the answers

What is the molecular weight of potassium chloride?

<p>74.55 g/mol (B)</p> Signup and view all the answers

What is the volume of CO2 produced at 37°C and 1.00 atm when 5.60 g of glucose are used up in the reaction?

<p>4.76 L (A)</p> Signup and view all the answers

What is the amount of chlorine gas in moles when 5.25 L of chlorine gas at 0.950 atm and 293 K reacts with 17.0 g of potassium metal?

<p>0.207 mol (C)</p> Signup and view all the answers

What is the mass of potassium chloride formed when 5.25 L of chlorine gas at 0.950 atm and 293 K reacts with 17.0 g of potassium metal?

<p>30.9 g KCl (D)</p> Signup and view all the answers

What is the temperature in Kelvin of the reaction between chlorine gas and potassium metal?

<p>293 K (C)</p> Signup and view all the answers

What is the mole ratio of potassium chloride to chlorine gas in the balanced equation Cl2 (g) + 2K (s) → 2KCl (s)?

<p>2:1 (D)</p> Signup and view all the answers

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