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Given an irregularly shaped lump of a material and determine that it has a mass of 33.7868 g. When placed in a graduated cylinder that initially contains 24.00 mL of water, the water level rises to 28.55 mL. What is the density of the unknown material?
What is the kinetic energy of the emitted electrons whencesium is exposed to UV rays of frequency 1.5x10 15 Hz?
List at least three potentially hazardous features associated with concentrated sulfuric acid.
Consider the reaction 2 Al2O3(s) ! 4 Al(s) + 3 O2(g) . H = +3339.6 kJ/mol What is H for the formation of one mole of Al2O3(s) from the elements.
When Cl2 is used as water disinfectant, the following reactions should be used to determine the concentration of different species.
Suppose that you have a 2.0 L sample of hydrogen at 1.00 atm and 59 C. If you heat the sample to 84 C and it expands to a volume of 3.7 L, what will the final pressure be?
If 32.0 g CaC2 are consumed in this reaction, how many moles of H2O are needed?
Inorganic phosphorous is spectrophotochemically measured in blood serum by formation of a reduced heteropoly acid (heteropoly blue) and comparison of its absorbance with a standard treated by the same procedure.
the molar heat of combustion of methanol, CH3OH, is -757kJ/mol. If 2g of methanol is placed in bomb calorimeter with heat capacity of 6.5 kJ/c, what is the temperature rise when the sample is combusted?
What do understand by the terms a) Empirical Formula b) isomerism and what conclusions can you draw from the following observations about the chemical nature of the organic liquid D?
An aqueous solution that contains 285ppm of potassium nitrate (KNO3) is being used to feed plants in a garden. What volume of this solution is needed to prepare 1.7 L of a solution that is 97 ppm in KNO3?
1. A corrosion technologist pipetted a 100.00 mL hard water sample and titrated it with 37.64 mL of 0.01 M EDTA solution for a total hardness endpoint, and 29.32 mL of 0.01 M EDTA solution for a calcium endpoint.
What type of bonding between amino acid residues is most important in holding a protein and polypeptide in a specific secondary configuration?
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