Questions asked by Danae

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• Calculate the volume in milliliters of 2.35 M potassium hydroxide that contains 13.5 g of solute?
  
• How do I calculate the molarity of 7.24 * 10^2 mL of solution containing 22.4 g of potassium iodide?
  
• How do I calculate the molarity of a solution prepared by diluting 87.44 mL of 0.743 M potassium chloride to 150.00 mL?
  
• How do I calculate the following quantity? Volume of 2.106 M copper (II) nitrate that must be diluted with water to prepare 670.2 mL of a 0.8351 M solution?
  
• Calculate the number of moles of solute in 497.2 L of 0.815 M sodium cyanide?
  
• How many milliliters of 0.306 M HCl are needed to react with 51.0 g of CaCO3?
  
• A sample of sulfur hexafluoride gas occupies 8.62 L at 221 degrees Celsius. Assuming that the pressure remains constant, what temperature (in Celsius) is needed to reduce the volume to 2.61 L?
  
• A sample of carbon monoxide occupies 2.44 L at 295.0 K and 771 torr. Find its volume at -47 degrees Celsius and 350 torr?
  
• A sample of chlorine gas is confined in a 3.93-L container at 407 torr and 21.0 degrees Celsius. How many moles of gas are in the sample?
  
• If 1.93 * 10^-3 mol of argon occupies a 65.8-mL container at 20 degrees Celsius, what is the pressure (in torr)?
  
• What is the density of Freon-11 (CFCl3) at 166 degrees Celsius and 5.92 atm?
  
• How do you calculate the molar mass of a gas at 347 torr and 77 degrees Celsius if 206 ng occupies 0.206 #mu#L?
  
• After 0.600 L of Ar at 1.29 atm and 223 degrees Celsius is mixed with 0.200 L of O2 at 535 torr and 106 degrees Celsius in a 400.-mL flask at 23 degrees Celsius, what is the pressure in the flask?
  
• After 0.600 L of Ar at 1.47 atm and 221 degrees Celsius is mixed with 0.200 L of O2 at 441 torr and 115 degrees Celsius in a 400.-mL flask at 24 degrees Celsius, what is the pressure in the flask?
  
• Aluminum reacts with excess hydrochloric acid to form aqueous aluminum chloride and 46.5 mL of hydrogen gas over water at 27 degrees Celsius and 751 mmHg. How many grams of aluminum reacted? The partial pressure of water at 27 C is 26.8 mmHg.
  
• How many grams of potassium chlorate decompose to potassium chloride and 797 mL of O2 at 128 degrees Celsius and 747 torr? 2KClO3 (s) = 2KCl (s) + 3O2 (g)
  
• A chemical engineer studying the properties of fuels placed 1.820 g of a hydrocarbon in the bomb of a calorimeter and filled it with O2 gas. What was the heat of the reaction for the combustion per gram of the fuel?
  
• How many grams of C2H4 must burn to give 84.0 kJ of heat?
  
• How do I calculate the ΔH this reaction?
  
• P (n) = 100 - 4n What is the relationship between n, and p(n)?
  
• Methane (CH4) has a boiling point of −164°C at 1.00 atm and a vapor pressure of 42.8 atm at −100°C. What is the heat of vaporization of CH4?
  
• Sketch the region bounded by the graphs of the algebraic functions and find the area of the region. f (x) = -x^2 + 2x + 3 and g (x) = x + 1 ?
  
• Sketch the region bounded by the graphs of the algebraic functions and find the area of the region f (y) = 1 - y^2 and g (y) = y - 1 ?
  
• How do you find the volume of a solid of revolution using the disk method for #y= 3/(x+1)#, #y=0#, #x=0#, #x=8# revolved about the #x#-axis?
  
• How do you find the volume of the solid formed by revolving the region bounded by the graphs of the equations #y=2x#, #y=4#, #x=0# using the shell method?
  
• How do you find the volume of the solid generated by revolving the bounded region by the graphs of #y=-x+2#, #y=0#, #x=0# about the y-axis?
  
• How do you find a definite integral that represents the arc length of the curve over the indicated interval #y=x^2+x+4# for #0lexle2# ?
  
• How do you find the area of the surface generated by revolving the curve #y=x^3/3# on the interval [0,3], about the x-axis?