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The heat of vaporization of a refrigerant is 1370 J/g. Calculate how many kilograms of refrigerant must be evaporated to freeze a tray of 16 one-ounce (1oz= 28g) ice cubes starting with the water at 18C. The heat capacity of water = 4.184 J/g*C and deltaH_fusion(water)= 330 J/g.
olutions of sucrose (table sugar, C12H22O11) are used in high speed centrifuges to separate the parts of a biological cell. How many liters of 3.53 M sucrose contain 111 g of solute
During interval II of an emulsion polymerization of styrene at 60?, there are 2.7 x1016particles/dm3 of latex, each latex particle containing styrene monomer at a volume fraction of 0.53. Given that, a reaction temperature, the density and rate coeff..
Determine the molar ratio of hydrogen to carbon in the fuel (r), where r=y/x, and the percentage excess air used in the combustion.
if 18.9 of 0.800 solution are needed to neutralize 5.00 of a household ammonia solution what is the molar concentration
what is the animals initial radiation exposure in curies? b) if all of the energy from the emitted alpha particles is absorbed by the animals tissues, and if the energy of each emission
a balloon is filled to a volume of 7.00x102 ml at a temperature of 20.0 degrees c. the balloon is then cooled at
Draw the skeletal structure of the neutral molecule for the condensed formula is PH2CH2CH2COCH3
A solution of vinegar has a 0.81M the manufacturer claims that the vinegar has 5% acetic acid by weight. the denisty is 1g/ml is the manufacturer correct
How many grams of oxygen can be added to the balloon before it pops? Assume the balloon had no gas in it before oxygen is added.
How many moles of O are needed to combine with 0.289 mole of C to form the following compounds, CO and CO2
when 50. grams of ethane gas is burned completely in oxygen. Carbon dioxide and water vapor are produce. How many mole of water vapor are produced?
what is the concentration of the dye in a solution with a percent transmittance reading of 45.8% at 640 nm
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