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A room contains 45 kg of air.How many kilowatt-hours of energy are necessary to heat the air in the house from 5 C to 29 C? The heat capacity of air is 1.03 J/ g C.
Using Wien's law, calculate the temperature a star must have for the peak wavelength of its blackbody curve to equal this value.
Calculate deltaS(Jmol^-1K^-1) for oxalic acid and delta S (Jmol^-1K^-1) for the combustion of one mole of oxalic acid.
In most amines, the nitrogen atom is hybridized, with a pyramidal structure and bond angles close to 109 . In urea, both nitrogen atoms are found to be planar
How much energy in kilojoules is required to convert 100 mL of diethyl ether at its boiling point from liquid to vapor if its density is 0.7138 g/mL.
A sample of oxygen gas () was found to effuse at a rate equal to three times that of an unknown gas. The molecular weight of the unknown gas is __________ g/mol.
what mass of solid sodium formate (of mw 68.01) must be added to 105 ml of 0.55 mol/l formic acid(HCOOH) to make a buffer solution having a ph of 3.96? ka=0.00018 for HCOOH
How does insulin promote glycogen synthesis in the liver? By binding to glycogen phosphorylase. By activating glycogen phosphorylase. By inhibiting glycogen synthase.
Calculate the amount of heat needed to boil benzene (C6H6), beginning from a temperature of 6.7 degrees celcius.
Suppose 1500 J of heat energy are put into a sample of liquid water at 25 degrees celsius, and the final temperature of the water is 75 degrees celsius. How many grams of water are present?
53.5 g of an ideal gas of molecular weight = 30.5 g/mol are confined at a pressure of 133 mmHg. The density of the gas is 0.228 g/L. Compute the temperature of the gas in degrees Celsius.
4.00 mL of 2.0E-3 M iron(III) nitrate solution is mixed with 5.00 mL of 2.0E-3 M potassium thiocyanate solution, 6.00 mL of 0.500 M nitric acid solution
952 cm3 container of gas is exerting a pressure of 108 kpa while at a temperature of 48 degrees celsius. calculate the pressure of this same amount of gas in a 1236 cm3 at a temperature of 64 degrees celsius.
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