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What is the minimum mass of ethylene glycol (ethane-1,2-diol, C2H6O2) that must be dissolved in 14.5 kg of water to prevent the solution from freezing at -22.0° C? (Assume ideal behaviour.)
What is the molar mass of a gas if 0.358 g of the gas occupies a volume of 186 mL at 5.00C and 1.10 atm.
A proton in a linear accelerator has a de Broglie wavelength of 144 pm. what is the speed of the proton?
5.00 moles of CO2(g) is in a rigid container with a volume of 3.00 liters. The initial temperature is 291 K and the initial pressure is 33.3 bar. Then 4.95 kJ of energy is added to the gas as heat; this raises the temperature to 325 K and raises t..
The zinc in a 1.274g sample of foot powder was precipiated as ZnNH4PO4. Strong heating of the precipiate yielded 0.4089g Zn2P2O7. Calculate the mass percent of zinc in the sample of foot powder.
Citric acid (H3C6H5O7) is a product of the fermentation of sucrose (C12H22O11) in air. C12H22O11(aq) + 3 O2(g) -> 2 H3C6H5O7(aq) + 3 H2O(l) Determine the mass of citric acid produced when 4.60 mol C12H22O11 is used.
Once the system has reached equilibrium, 5.00 g of NO2 is injected into the vessel, and the system is allowed to equilibrate once again. Calculate the mass of NO2 in the final equilibrium mixture.
Magnesium metal is used as a sacrificial anode to reduce the corrosion of underground storage tanks (made of iron, or more accurately, steel which is an iron/carbon alloy). As a result the sacrificial metal corrodes instead of the iron. Explain th..
An aqueous solution of copper sulfate was found to have an absorbance of 0.168 at 265 nm when measured in a cuvette with a path-length of 0.500cm. If the absorptivity of the transition is 11.5m^2/mol what is the copper concentration in
The two half-cells are connected by a salt bridge. Aluminum metal is oxidized during operation of the voltaic cell. What is the half-reaction that occurs at the cathode
How would you expect the graph to look if you tried to distill a mixture of pentane and touene. Draw and lable the graph
Calculate the molar concentration of CO2 for a sample that has a pH of 6.220 and a HCO -3 concentration of 0.0020 M. For carbonic acid pKa1=6.33 and pKa2=10.35.
How many unit cells are in exactly 1 cm3?
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