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From data below, calculate the total heat (in J) associated with the conversion of 0.412 mol ethanol gas (C2H6O) at 501°C and 1 atm to liquid ethanol at 25.0°C and 1 atm. (Pay attention to the sign of the heat.) Boiling point at 1 atm 78.5°C cgas 1.43 J/g°C cliquid 2.45 J/g°C H°vap 40.5 kJ/mol
What is the density of lead (in ) if a rectangular bar measuring 0.50 in height, 1.55 in width, and 25.00 in length has a mass of 219.5 ?
What tripeptide would be synthesized from the informational strand of DNA with the sequence 5' GTATCCAGT?
Calculate Ea. Express your answer using two significant figures Ea= kJ/mol Calculate A. Express your answer using one significant figure. A = M-1s-1
At its boiling point of -34.0 degree Celsius, 6.33 kJ of heat is required to vaporize 22.0 g of chlorine (Cl2). What is the molar enthalpy of vaporization of chlorine.
calculate the concentrations of all species in a .890 m sodium sulfite solution. the ionization constants for sulfurous acid are ka1= 1.4x10^-2 and ka2=6.3x10^-8
An open flask sitting in a lab fridge looks empty, but we know that actually it is filled with a mixture of gases called air.
Calculate the percent of a strontium sample left after 100 years. The half-life of strontium-90 is 28.1 years.
The density of germanium is 5.325 g/cm3. If you made a 5.3-nm diameter quantum dot of germanium, how many Ge atoms would it contain? Assume the dot is spherical.
How many moles of oxygen atoms are combined with 4.20 moles of chlorine atoms in Cl2O7?
suppose that 2.00L of solution are made from 150. mg of citric acid, C6H8O7, A. what is the molar mass of citric acid? B. what is the molarity of citric acid in the solution?
Solar furnaces are designed to focus sunlight (say, with a parabolic mirror ) onto a relatively small area. given that the surface temperature of the sun is about 600K.
How many moles of Na2SO3 were added to the calorimeter cup if 40.0mL 0.50 M NaOCl and 60.0mL 0.50 M Na2SO3 were combined?
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