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a .50 g sample of vegetable oil is placed in a calorimeter when the sample is burned 18.9kJ are given off what is the caloric value of the oil.
A 28.5 g sample of an unknown metal is heated to 95.0C and then dropped into 58.0 g of water in a coffee-cup calorimeter. The temperature of the water rises from 23.5 C to 27.1C.
A sample of gas originally at 37.2oC and 1.25 atm pressure in a 3.4 L container is allowed to expand until the pressure is 0.73 atm and the temperature is 14.9oC.
Calculate the value of delta S when 1.85 mol CH3OH (l) of is vaporized at 64.7 C. The normal boiling point of methanol is 64.7 C.
If 275 g of liquid water at 100.°C and 475 g of water at 30.0°C are mixed in an insulated container, what is the final temperature?
Write the equation for the formation of ethyl acetate, What is the purpose of sulfuric acid? What happens if water is removed from the reaction mixture.
A beaker with 1.30×102 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M .
Arrange these compounds in order of increasing boiling point and explain your reasoning. (assume similar mass) CH3OCH3 CH3CH2CH3 CH3CH2OH 2. Which of the following compounds would have the greater viscosity?
Estimate the magnitude of the absoulte error and percent error in the measured sample volumes. Compare those errors to the errors that occur when measuring volumes of approximately 8mL
How many grams of sodium formate, NaCHO2, must be added to 750.0mL of .250 M of formic acid, HCHO2, to obtain a buffer with pH of 5.5 ?
Find the reaction order using a Powell plot or the fractional-life method and also estimate the rate constant
What are the concentrations of HSO4-, SO42-, and H+ in a 0.255 M KHSO4 solution? (Hint: H2SO4 is a strong acid; Ka for HSO4- = 1.3 10-2.)
what is the minimum amount of ice at 0C that must be added to the contents of a can of diet cola (340mL) to cool it from 20.5C to 0C?
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