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Provide a structure for the following compound: EI mass spectrum: two molecular ions of about equal intensity at m/z = 180 and 182; IR: 1740 cm-1; 1H NMR: ? 1.30 (3H, t J = 7 Hz); ? 1.80 (3H, d, J = 7 Hz); ? 4.23 (2H, q, J = 7 Hz); ? 4.37 (1H, q, J = 7 Hz).
A gas occupying a volume of 248 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume.
An unknown metal with a mass of 28g absorbs 58J of heat. Its temperature rises from 31.1C to 39.9C. Calculate the heat capacity of the metal ?
Draw the possible chair forms of cis and trans 1-isopropyl-3-methylcyclohexane. Are the two forms identical, enantiomeric, or diastereomeric?
The vapor pressure of pure ethyl bromide at this temperature is 400.0 torr. Assuming an ideal solution, what is the molecular mass of the compound?
A buffer solution is prepared by adding 0.125 mol of ammonium chloride to 500 mL of 0.500 M solution of ammonium. What is the pH of the buffer
Tin carbonate solid is treated with nitric acid to dissolve tin carbonate to give tin nitrate, water and carbon dioxide. a) Write a balanced equation for the reaction.
A mass of solid potassium chlorate undergoes thermal decomposition in the presence of a catalyst (manganese dioxide) to produce solid potassium chloride and oxygen gas. As a result, 250mL of oxygen are collected over water at 26.0 degrees C and a ..
If the symbol X represents a central atom, Y represents outer atoms, and Z represents lone pairs on the central atom, the structure that could be abbreviated as XY2Z2.
Complete combustion of 75.0 g acetylene, C2H2, liberated 3750 kJ of heat
The density of the sample is 1.01 g/mL. The titrant is 1.017 M NaOH. The average volume of titrant required to titrate 25.00 mL subsamples of the vinegar is 20.78 mL. What is the concentration of acetic acid in the vinegar? Express your answer the..
What is the acceleration due to gravity at a point 5 cm from the center of a centrifuge rotor spinning
Calculate the probability of finding an electron that is described by this wavefunction in a volume of 1.0 pm3 (i) centred on the nucleus.
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