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175 g of water was heated from 15 degrees to 88 degrees C. How many kilocalories were absorbed by the water?
Assume that a particular reaction evolves 245kJ of heat and that 24kJ of work is gained by the system what is the delta H inside and the surroundings
What are the frequency and energy of a photon with a wavelength of 900 nm. Report your answers to three significant digits.
process it is given that Rubidium has a heat of vaporization =69.0 kJ/mol at its boiling pt= (686°C). Compute ΔS for this process?
The density of germanium is 5.325 g/cm^3 . If you made a 4 nm quantum dot of germanium, how many atoms would it contain? Assume the dot is spherical.
How much energy (in kilojoules) is required to convert 110 mL of diethyl ether at its boiling point from liquid to vapor if its density is 0.7138 ?
What are the products from the combustion of 2-methyl-3-ethyloctane?
Calculate How many grams of H2O at temperature 25 degree Celsius should be poored on the ice with no water in flask initially.
A solution is made by adding 50.0 mL of ethanol (C2H5OH, d = 0.789 g/mL) to 50.0 mL of water (d = 0.998g/mL). What is the total vapor pressure over the solution
The volume of a sample of ideal gas at 25 degrees celius is 372 mL. what will be the volume of the gas if it is heated at constant pressure to 50 degrees celius? what will the volume fo the gas be if it is cooled to -272 degrees celius.
A 100 mm diameter silicon wafer is oxidized completely. What is the thickness of the resulting SiO2 wafer? The molecular weight of Si is 28 g/mol and of SiO2 is 60 g/mol.
The solubility of the ionic compound M2X3, having a molar mass of 205 g/mol, is 3.16 10-7 g/L. Calculate the Ksp of the compound.
Determine the mass of the liquids in grams if this liquid is added to the beaker the combined mass becomes 238.254 grams? Given that the mass of beaker=225.08 g?
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