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Why is the intercept of a calibration curve of absorbance vs concentration not zero? What reasons can cause a calibration curve to not have a zero intercept?
25.0 mL of 1.50M LiOH are neutralized by 15.0mL of nitric acid. what is the molarity of HNO3?
Alkenes and non conjugated dienes usually have absorption maxima below 200nm. Compounds that have conjugated multiple bonds have maxima at wavelengths longer than 200nm.
A 26.0-g sample of ice at -10.0°C is mixed with 114.0 g of water at 72.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
When heated, hydrogen sulfide gas decomposes according to the equation above. A 4.40 g sample of H2S(g) is introduced into an evacuated rigid 1.50 L container. The sealed container is heated to 583 K and 5.72x10^-2 mol of S2(g) is present at equil..
Oxygen at 150 K and 41.64 atm has a tabulated specific volume of 4.684 cm3/g and a specific internal energy of 1706 J/mol.
Determine the mole fraction of sodium chloride(NaCl) in the solution if this solution is formed by mixing 17.0 grams of sodium chloride NaCl in 85.0 grams of Water?
Explain how the carbonate system in natural waters provides buffering capacity
Suppose you have 0.001 M solution of a dye with pka of 7.2. from the color, concentration of protonated form is found to be 0.0002 M. Assume remainder of the dye is in the deprotonated form. What is the pH of the solution?
What is the molarity of a solution that contains 35.0 g of vitamin B1 hydrochloride (molar mass = 337 g/mol ) in 110 g of solution?
a solution is prepared by dissolving 20.0 g of NaI in enoug water tomake 300.mL of solution How many moles of ions are in 25.mL of thesolution?
a sample of a gas has a mass og 0.311g. its volume is 0.225 L at a temperature of 55 degrees C and a pressure of 886 mmHg. find its molar mass
A compound containing only carbon, hydrogen, and oxygen is subjected to elemental analysis. Upon complete combustion, a 0.9294-g sample of the compound
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