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How much aluminium can be made with 1 kwhr of electricity of 5 V of external potential supplied and used at 75% efficiency
The concentration of commercially available nitric acid is 70.0 percent by mass, or 15.9M. In 100 grams of solution, there are 1.11 mol HNO3. Calculate the volume of 100 g of the solution.
A 22.0 mL sample of vinegar, which is an aqueous solution of acetic acid, HC2H3O2 , requires 24.5 mL of 0.450 M NaOH to reach the endpoint in a titration. What is the molarity of the acetic acid solution
A vessel containing saturated vapor steam at 175 C is cooled to 40 C. The total mass of its contents is 450g. Determine the final volume of liquid water in the vessel.
A gas mixture is made by combining 7.2g each of Ar, Ne, and an unknown diatomic gas. At STP, the mixture occupies a volume of 92.04L. What is the molar mass of the unknown gas in g/mol, and identify the unknown gas
Consider the acid HB with a Ka=5.8 x 10-10 (a) what is the kb for the B- ion and (b) what is the pkb
As a result of photosynthesis, 1.0 kg of carbon is fixed per square meter of forest. Assuming air is 0.046% CO2 by weight, what volume of air is required to provide 1.0 kg of fixed carbon
How is HCl a base if it has no OH ions in is formula to omit when dissolved? Where does it's O come from
The chemical mechanism of the reaction involves transfer of phosphoryl group to the enzyme, forming a phospho-enzyme intermediate: a His residue is phosphorylated, and H2O hydrolyzes the P enzyme intermediate. Determine the type of mechanism
At 20 degrees C, the vapor pressure of ethanol is 45 torr and the vapor pressure of methanol is 92 torr. What is the vapor pressure at 20 degrees C of a solution by mixing 27.0 g of methanol and 75.0 g of ethanol?
D2O with a mass concentration of 80 mg/cm3 in a 0.10-mm-long absorption cell is found to have a transmittance of 8.3% for infrared radiation of wavelength 6000 nm. Find the absorbance of the solution and the molar absorption coefficient of lysozym..
Determine what type of bond is expected for a compound formed between Magnesium and Oxygen Based on these values,?
Buckminsterfullerene C60 crystallizes in a face-centered cubic arrangement. If potassium atoms fill all the tetrahedral and octahedral holes, what is the formula of the resulting compound?
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