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A 12.5 g ice cube has a temperature of -15C. This ice cube completely melts when it is placed in 855g of liquid ethanol (C2H5OH). If the initial temperature of the ethanol was 22.5C and the heat capacity of liquid ethanol is 2.44 J/gC, what is the final temperature of this water/ethanol mixture? (Note: Assume there are no chemical interactions between the water and the ethanol that affect the temperature.)
In 1978, scientists extracted a compound with antitumor and antivirus properties from marine animals in the Caribbean Sea. A sample of the compound didemnin-A
ideal gas on a cool morning (11*C). The air is heated to 103*C. What is the volume of the air in the balloon after it is heated?
a sample contains both KBr and KI in the unknown quantities. If the sample has a total mass of 5.00g and contains 1.51g K, what are the percentages of KBr and KI in the sample by mass?
Determine the mass of CuSO4 · 5H2O that must be used to prepare 250 mL of 0.88 M CuSO4(aq).Answer in units of g.
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.
The density of an unknown gas is 2.00 grams per liter at 3.00 atmospheres pressure and 127 degrees C. What is the molcular weight of the gas?
A 100 ppm quininesulfate ( MW = 782.97 g/mol) solution was used as the standard. Assuming that your original (undiluted) sample contained 142 ppm of quinine sulfate, calculate the amount in ppm of quinine in the sample.
An anesthetic contains 64.9 % carbon, 13.5 % hydrogen, and 21.6 % oxygen by mass. At 120 degrees C and 750 mmHg, 1.00 L of the gaseous compound weighs 2.30 g.
In an experiment, at this temperature, 1.10 mol of H2 and 1.10 mol of F2 are introduced into a 1.08-L flask and allowed to react. At equilibrium, all species remain in the gas phase.
How do you know when to draw a single/double/triple bond when drawing Lewis Structures? I need a good answer because I still don't understand Lewis Strucctures.
carbon monoxide (CO) in an reaction to produce 2 moles of iron and three moles of carbon dioxide, what is the mole ratio between these reactants?
How many hours will it take to produce 61.0 kg of Al metal by the reduction of Al3+ in an electrolytic cell using a current of 484 amps?
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