Questions asked by Trece N.

• Back to user's profile
• The volume of a balloon is 6.52 L at 32.5 ºC and 762 mm Hg pressure. What volume in mL will the balloon have at standard temperature and pressure (STP)?  
  
• At 22.5 ºC and 1.25 atm pressure, a sample of carbon dioxide gas occupies a volume of 2.65 L. How many moles of the gas are present?
  
• If the pressure exerted by 0.0735 moles of a gas is 1.05 atm and the volume is 2050 mL, what is the temperature of the sample in Celsius?
  
• What is the pressure of a gas in kPa if 0.250 moles of the gas occupies a volume of 4.75 liters at 273 K?
  
• How many liters of carbon dioxide are released when 355 grams of pentane (#C_5H_10#) is burned in air at STP?
  
• The volume of a balloon is 6.52 L at 32.5 ºC and 762 mm Hg pressure. What volume in mL will the balloon have at standard temperature and pressure (STP)?  
  
• What is the Absolute Zero in the following conditions? Temp Air (oC) ~ x-axis Vol Air (mL) ~y-axis 100 140 20 110 4 105
  
• Charles’ Law allows the prediction of gas volumes at different temperatures. What would the volume of a gas be at 38.3 C if it started at a volume of 45.7mL and a temperature of -58.5 C?
  
• Why is it necessary for temperatures to be converted to Kelvin, rather than being represented in Celcius when completing gas law equations?
  
• What is the pH of a HCl solution which is 5.0 x 10-2 M?
  
• What is the [OH-] of a solution whose pH is 2.45?
  
• What is the volume of a sample of NaOH solution that contains 154 grams of NaOH and has a concentration of 0.55 M?
  
• What is the freezing point of a solution that contains 3.5 mol of the ionic solid BaCl2 dissolved in 500 grams of water?
  
• What is the [OH-] of a solution whose [H3O+] is 2.50 x 10-4 ?
  
• You mix about 375 grams of sugar (C12H22O11) with 1255 mL of water (remember: density of water = 1.00 g/mL). What is the molality of the solution?