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When 45.0 g of an unknown nonvolatile nonelectrolyte is dissolved in 500.0 g of water, the resulting solution freezes at -0.930 °C. What is the molar mass of the unknown substance? Kf = 1.86 °C/m for water.
Strontium carbonate decomposes upon heating to strontium oxide and carbon dioxide. Calculate the number of g of carbon dioxide produced by heating 10.7 g of strontium.
Explain which of the following aqueous solutions has the strongest ion-dipole attractions: 0.3 M FeBr3, 0.6 M CaCl2, 0.5 M Ba(NO3)2, 0.2 M (NH4)2SO4, 0.9 M KOH
the density of aluminum is 2.7 g/cm cubed, if the volume of this object is 12ml, what is the mass of the grams?
a chemist prepares a solution by dissolving 2.228 g of nano3 in enough water to make 200 ml of solution. what molar
compound a is an optically active alcohol. treatment with chromic acid converts a into a ketone b. in a separate
isopropyl alcohol c3h8o is sold in drug stores as rubbing alcohol. isopropyl alcohol is a water-soluble liquid with a
After adding the two portions of water into your calorimeter setup and following the procedure outlined in the experiment, you determine the temperature of the mixed portions of water to be 45 oC. What is the heat capacity of the calorimeter
The atom then emits two photons: one of wavelength 1282.2 nm to reach an intermediate level and a second to return to the ground state. What was the wavelength of the second photon emitted?
Determine the mechanism for metal-ammonia reduction of 4-bromo-5-methylhex-2-yne. Depict the final product of the reaction with the correct stereochemistry.
calculate the mass of propylene glycol that must be added to 0.500 kg of water to reduce the vapor pressure by 4.60
10g of CH4 is combusted in a calorimeter that has an empty heat capacity of 18 J/C. The calorimeter contained 150 g of water. If the temperature changed from 25.2C to 30.3C. Calculate the molar heat of combustion of methane in J/mol
"Tungsten with a mass numer of 185 and atomic number of 74, decays by beta emissions. Identify the product of the nuclear reaction by its atomic symboll, mass number and atomic number?".
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