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If your lab partner has a bad habit of measuring volumes in a graduated cylinder from the top of a meniscus instead of from the bottom, will your value for Avogadro's number be increased or decreased? Carefully explain your reasoning.
In an experiment 1.550g of mercury oxide decomposed to give oxygen gas and 1.435g of liquid mercury. What is the empirical formula of mercury oxide
the expresssion for the freezing point depression of a solution relative to that of the pure solute is shown above.
a mixture containing 235 mg of helium and 325 mg of neon has a total pressure of 453 torr. what is the partial pressure of helium in the mixture?
what is the ph of a solution prepared by mixing 25 ml of 0.10 m methylamine with 25 ml of 0.10 m methylammonium
the atomic weight of a newly discovered element is 98.225 amu. it has two naturally occuring isotopes. one isotope has
Devise a synthesis of hexanedial OHC(CH2)4CHO from phenol and any needed organic or inorganic reagents.
For a protein w/ a molar mass of 1x10 6 u, calculate the molar concentration required to obtain an osmotic pressure of 10 matm at 25 degrees C
Calculate the number of kilograms of helium needed to inflate a balloon to a volume of 100,000 L at an atmospheric pressure of 250 mmHg and a temperature of -35 °C.
the decomposition of dinitrogen pentoxide is described by the chemical equation2 n2o5g ? 4 no2g o2gif the rate of
Tungsten crystallizes in a cubic unit cell with an esge length of 3.165 (Angrstroms)and with a tungsten atom on each of the corners of the unit cell and in the center of the unit cell
74.0 mL of a 1.80 M solution is diluted to a volume of 268 mL. A 134-mL portion of that solution is diluted using 179 mL of water. What is the final concentration.
An excited electron in a hydrogen atom relaxes to the n=4 level emitting light with a frequency of 1.141*10^14 Hz. In what principal quantum level did the electron begin?
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