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A sample of chloroform is found to contain 12.4 g of carbon, 109.9 g of chlorine, and 1.04 g of hydrogen. If a second sample of chloroform is found to contain 28.6 g of carbon, what is the total mass of chloroform in the second sample?
An indentified liquid from the same stockroom was also analyzed: MS showed m/z =78 for the M+ and IR displayed bands at 3025 and 1603. What is the structure and name of liquid
Stalactites--the long icicle, icicle like formations that hang from the ceilings of caves--are formed from recrystallizing minerals like calcite (calcium carbonate, CaCO3, 100.09 g/mol). The Ksp of calcium carbonate is 4.5 x 10^-9.
Using the values from appendix C in the text calculate the Entropy and Enthalpy changes for the decomposition of ammonia into nitrogen and hydrogen at 298K and 1.0atm. Then determine the temperature at which the gases are in equilibrium with each ..
a solution containing 40.7g of calcium nitrate in a volume of 0.500 l was prepared.a. calculate the number of moles of
if a sample of the compound contains 0.273 mol a 0.410 mol b and 0.546 mol c then determine the formula of a
An atomic absorption method for the determination of the amount of iron present in used jet engine oil was found, from pooling 30triplicate analyses, to have a standard deviation s=2.4 µgFe/mL. Calculate the 80% and 95% confidence limits for the r..
What types differences in the H-NMR spectra of starting material and product do you expect to see camphor, borneol
Why is it important to be careful when working with barium chloride dihydrate in a lab measuring percent water in a hydrate
When cyclopentane is exposed to Br2 in the presence of light, reaction occurs. Write the formulas of all possible monobromination products. Draw molecule by placing atoms on grid.
The pressure of an unknown gas is measured with a manometer. Instead of mercury the manometer is filled with a liquid (X) whose density is 0.673 g/cc. The pressure is measured as 591 mmX. What is the pressure in mmHg
A temperature measurement of has three significant figures, while a temperature measurement of has only two significant figures. explain why this is
How much heat energy, is needed to convert 64.0 grams of ice at -18.0 degrees celcius to H2O at the temperature of 25.0 degrees celcius? Express your answers in kilojoules
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