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The chemical formula for caffeine isC8H10N4O2. Explain how many grams of carbon are present in a 12.46 gram sample of caffeine?
To a buffer solution containing 0.100M of HNO2 and 0.150M of KNO2 with calculations determine if the added amount of the following compounds exceeds its buffer capacity.
what starting material are needed to prepare the following compound using malonic ester synthesis
Determine the electron-group arrangement, molecular shape, and molecular bond angle that best describes each of the following.
from the experimental data we obtain i- directly. to obtain ksp for pbi2 we must calculate pb2 in each equilibrium
Three solutions are mixed to form a single solution. One contains 0.2 mol Pb(C2H3O2)2, the second contains 0.1 mol Na2S, and the third contains 0.1 mol CaCl2.
A 14.0 L gas cylinder is filled with 8.00 moles of gas. The tank is stored at 9 degrees celsius . What is the pressure in the tank
If the experimentally determined calibration curve is Absorbance = 12100 M-1 * [ferroin (M)] + 0.00230 and the measured absorbance of a sample solution is 0.367, what is the ferroin concentration in the measured solution
An 80.0-gram sample of a gas was heated from 25 °C to 225 °C. During this process, 346 J of work was done by the system and its internal energy increased by 7805 J. What is the specific heat of the gas
A gas is compressed from an initial volume of 5.40 to a final volume of 1.20 by an external pressure of 1.00 . During the compression the gas releases 126 of heat.
Draw the chemical structure ( including all atoms and bonds) for the compound with the systematic name:6,7-dichloro-5-methyl-4-transaminophenyl-cis-2-heptane-ol
A sample of gas (24.2 g) initially at 4.00 bar was compressed from 8.00 L to 2.00 L at constant temperature. After the compression, the gas pressure was ________ bar.
On the basis of the general solubility rules given in the table, predict the identity of the precipitate that forms when aqueous solutions of the following substances are mixed. Indicate which rules apply.
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