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A 211 lb man eats an order of FrenchFries consuming 250 Cal of food energy. Afterwards he feels guiltyand decides to work off the excess calories by walking upnine flights of stairs 2.0 times. (The
A basketball is inflated to 9.0 psi (pounds per square inch) above atmospheric pressure of 14.7 psi (a total of 23.7 psi). The diameter of the basketball is 10. inches.
An alcohol solution contains 50.0 g of1-propanol (C3H7OH) and 155.0 g of ethanol (C2H5OH).Calculate the mass percent and the mole fraction of each alcohol.
How many mL of 0.2 M sodium acetate should be added to 200 mLof 0.1 M acetic acid to make a buffer of pH 5? What will the total concentration of acetate be in the solution (acetate + aceticacid)?
Calculate the boiling point of a solution containing 50.00g ofsodium phosphate dissolved in 175.0g of dihydrogen monoxide.
Pure benzene has a freezing point of 5.45 C and a boiling point of80.2C. Its constants for freezing point depression and boilingpoint elevation are -5.07 C/m and +2.53 C/m .
Half way through grading last semester's final, your illustrious instructor got really depressed and decided that Barbancourt 5-Start would help.
An atomic mass unit has been defined as 1/12th the mass of an atom of C-12. Suppose one atomic mass unit was redefined as being equal to 1/36th mass of a C-12 atom.
What would be the partial pressure of all species if No andBr2 at an initial pressure of 0.30 atm, were allowed to come to equilibrium at this temperature?
When 0.100L of 2.0M potassium hydroxide and 0.100L of 2.0M nitricacid are mixed in a coffee-cup calorimeter, the temperatureincreases from 20.210C to 28.480C. Calculate the enthalpy change for the n
A 189 lb man eats an order of FrenchFries consuming 250 Cal of food energy. Afterwards he feels guiltyand decides to work off the excess calories by walking upsix flights of stairs 3.0 times.
A very dilute solution contains 116 mg of fructose (M=180.16 gmol-1) in 1.000 liter solution. it is placed in a semipermeablemembrane bladder, which is then suspended by a support in some purewater.
Caustic soda is 19.1m NaOH and is diluted for householduse. What is the household concentration if 10mL of the concentrated solution is diluted to 400mL?
Calculate the amount of methanol that you would use to recrystallize the sample. If the crystals arecollected at 25oC, what is the maximum possible recovery?
The elemental analysis of an organic solid extracted from gumarabic showed that it contained 40% C, 6.7% H, and 53.3% O. Asolution of 0.650 g of the solid in 27.8 g of the solvent diphenylgave a fre
Calculate the molality of commercial available HCl from the following data formula weight 36.465, density of the solution(g/ml) 1.19, weight % 37.2 and Molarity 12.1
The solubility of nitrogen gas at 25 degrees and a nitrogenpressure of 522 mmHg is 4.7 x 10-4 mol/L. What is the value of the Henry's Law constant in mol/L(atm)?
An aluminum can is cut into small pieces. A .74 gram sample of the aluminum "chips" is used to prepare potassium alum according to the procedure described in this experiment.
A mass of 12.96 gram of (NH4)2SO4(molar mass= 132.06g/mol) is dissolved in water. After the solutionis heated, 25.11grams of Al2(SO4)3 18H2O (molar mass = 666.36 g/mol) is added.
How many liters of the antifreeze ethylene glycol would you add toa car radiator containing 6.50L of water if the coldest winter temperature is -26.0 degrees Celsius?
The compound trans-2-chlorocyclohexanol reacts rapidly with NaOH to form an epoxide. The cis stereoisomer is relatively unreactive, and does not form an epoxide.
The running engine of an automobile produces carbon monoxide (CO),a toxic gas, at the rate of 199 g CO per hour. A car is left idlingin a poorly ventilated garage that is 6.0 m long, 4.0 m wide, and
A helium balloon rises because the helium inside the balloon weighsless than the same volume of air it displaces. If a balloon has avolume of 37.3 L, what is the mass of helium inside the balloon? W
How many moles of Bromine (Br2) vapor would be obtained if 3.50 Lof dry chlorine (Cl2), measured at 15 degrees celsius and 760 mmHg were absorbed by a potassium bromide solution?
A balloon inflated with 0.2494 g of Helium to pressure of 1.26 atm.if the desired volume of the balloon is 1.25 L, what must the temperature be in celsius?