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Question: What is the magnitude and sign of the molar heat of vaporization of butane? Explain using Hess's law. Is your sign for the heat of vaporization realistic? Explain.
The enthalpy of combustion of acetylene C2H2 is C2H2(g) + 5/2O2(g) ->2CO2(g) + H2O(l) H°rxn= -1299 kJ Calculate the enthalpy of formation of acetylene, given the following enthalpies of formation H°f[CO2(g)] = -393.5 kJ/mol ,H°f[H2O(l)] = -285.8 k..
Batting averages of baseball players are reported in parts per thousand. what would be the batting average of a hitter
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 ? NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5.
In a calorimeter, 10.0 g of ice melts at 0oC. The enthalpy of fusion of the ice is 334 J/g. How much heat was absorbed?
What is the boiling point of a 4.08 m solution of naphthalene in benzene. The boiling point of benzene is 80.1°C. here is some information to help you on this problem.
a graduated cylinder contains 10.0ml of water. if the volume of a single water molecule is 2.99 x 10e-23 cm e3 how many
an 85.0-ml aqueous solution contains 7.54 g iron ii chloride fecl2calculate molarity of the solution.what is the mass
Deuterium is an isotope of hydrogen. The abundance of deuterium in water is 0.0150%. How many moles of water would be required to obtain 0.0730 moles of deuterium (D2)
neon has three naturally occurring isotopes 20ne 19.992amu with 90.48 abundance 22 ne21.991amu with 9.25 abundance and
A gas sample occupies a volume of 20cm^3 at 40 degree Celsius and at a pressure of 1.60atm. What volume will it occupy at STP?
Determine which gases remain after the reaction goes to completion and calculate their partial pressures. The temperature at the beginnning and the end of the experiment is 22 °C.
Arrange the items on the food chain according to increasing mercury levels: microorganisms, people, small fish, and sharks.
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