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Question- During a titration, it is found that 53.5 mL of a solution of NaOH is needed to neutralize a solution that contains 1.86 g of HCl.
What is the concentration in molarity of the NaOH solution?
Please explain why you chose your answer!
Joe Schmoe mixed peroxide with yeast to generate oxygen gas and collected the gas in a graduated cylinder, using the same set up as was used in Experiment 11. He collected the following data
What is the percentage of (R)-phenylalanine present in this mixture? d. What is the percentage of (S)-phenylalanine present in this mixture?
What mass of should be added to 630 of the paraffin in formulating the mixture if the vapor pressure of ethanol at 35 over the mixture is to be 9. The vapor pressure of pure ethanol at 35 is 100.
1.50 mol of helium gas in a cylinder is held at a volume of 22.4 L by a piston at 273K and 1.00 atm. Heat is supplied to the system to double the volume and temperature of the gas while maintaining the internal pressure at 1.00 atm.
During a Fischer esterification of p-aminobenzoic acid using absolute ethanol and concentrated sulfuric acid, what is the solid that separates when the sulfuric acid is added to the ethanolic solution of p-aminobenzoic acid
Question- A 0.785 gram sample of a diatomic element occupies 248 mL at STP. What are the molar mass and formula of the element. (Answer is 70.9g/mol, Cl2)
When an interfering substance M is present, a fluoride ion selective electrode obeys the following modified response equation
The rate constant for the reaction at 45oC is 0.130L*mol-1*s-1. Explain how long does it take an initial concentration of 0.060 mol/L to reduce to one-quarter the initial concentration
Calculate the enthalpy of reaction at 490 K. You may assume that the heat capacity is constant, and corresponds to the value at 298 K. You may also assume that there are no phase changes in this system
A particular formula contains by mass 41.4 g C, 3.47g H and 55.1 g O. 0.050 mol sample of the compound weigh 5.80 g. the molecular formular is
Calculate the pH during the titration of 40mL of .1M HCl with .1M NaOH solution after the following additions of base:
A piece of Al(s) at 94°C is placed in 65g of H2O at 28°C. The Aluminum cools and after equilibrium the final temperature of Aluminum and water is 38°C. What was the mass of the aluminum?
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