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what experimental variables must be controlled to assure reproducible absorbance data?
Calculate the amount of heat necessary to raise the temperature of 12.0g of water from 15.4 degrees celsius to 93.0 degrees celsius
When using paper chromatography to separate components of a mixture, the manual suggests that water is wicked through the paper.
Ammonia, NH3, can be synthesized by the following reaction: 2 NO (g) + 5 H2(g) -> 2 NH3(g) + 2 H2O(g) Starting with 86.3 g NO and 25.6 g H2, find the theoretical yield of ammonia in grams
A sample of H2 gas has a pressure of 0.695 atm in a 269 mL flask. The sample is transferred to another container where it exerts a pressure of 0.330 atm. What is the volume (mL) of the second container at the same temperature
Protein Quantification why is it more useful to plot absorbance vs. weight units(mg/ml) instead of absorbance vs. molar concentration?
A stock solution is prepared by adding 22 mL of 1 M Na3PO4 to enough water to make 73 mL. What is the PO43- concentration of 30 mL of the stock solution?
a compound is composed of only C.H and O. the combustion of a 0.519-g sample of the compound yields 1.24g of CO2 and 0.255g of H2O.
Use the systematic treatment of equilibrium to determine the pH and concentrations of species in 1.00 L of solution contatining 0.070 lysine HL 0.055 mol aspartic acid H2A and 0.0080 mol NaOH.
describe the observations you would make and write a net ionic equation for any reaction that would occur.
the reaction of concentrated hydrochloric acid with zinc metal -the reaction of solid strontium carbonate with nitric acid
What is the molality of chromium(III) chloride in a solution prepared by dissolving 75.2 g chromium(III) chloride hexahydrate (CrCl3· 6H2O) in 250.0 g of water.
How many grams of oxygen would be required in the combustion of propane to produce 582 kJ of heat?
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