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An unknown concentration of tap water is transferred to a 100 mL volumetric flask and diluted with DI water to 100mL. Then 50 mL of this diluted tap water is transferred to another volumetric flask and diluted again to 100mL. The absorbency is tested through experimentation with standards of Fe and fit to a calibration curve. The concentration of Fe for the twice diluted sample is found to be about 1.875ppm. What is the concentration of Fe in the original sample of tap water?
Cyclopentadine (C5H6) reacts with itself to form dicylopentadiene (C10H12). The following data were collected as the reaction proceeded.
Blood alcohol content (BAC) is often reported in weight-volume percent (w/v%). For example, a BAC of 0.08% corresponds to 0.08 g CH3CH2OH per 100 mL of blood. In Ontario, and the rest of Canada, the maximum legal BAC for fully licensed drivers is ..
An automobile gasoline tank hold 21kg of gas. When the gasoline burns, 84kg of oxygen is consumed and carbon dioxide and water vapor are produced. What is the total combined mass of carbon dioxide and water that is produced?
how much ice in grams would have to melt to lower the temperature of 358 g of water from 40 degrees to 0 degrees?
Use the results of your calc. in analysis and int. item 2 and the mole ratio from equation in analy. And int. item 3 to determine the moles of vinegar.
How many grams of formic acid, HCOOH, must be added to 0.240 L of 0.110 M sodium formate, HCOONa, to yield a buffer solution with a pH of 3.50. Assume no volume change. Ka of HCOOH = 5.0 10-4
A 1- flask is filled with 1.20 of argon at 25 . A sample of ethane vapor is added to the same flask until the total pressure is 1.45 .
a bicycle tire is filled with air to a pressure of 100 psi at a temperature of 100 degrees C. Riding the bike on asphalt on a hot day increases the temperature of the tire to 58 degrees C. the volume of the tire is increased by 4%. what is the new..
how will you use the known compounds that are out in the lab to help you find the identity of your unknown compounds
how can you determine if they are the same without using any form of spectroscopy? explain the physical/chemical reasons why your proposed method would work
Calculate the entropy change for vaporization of 18 g of H2O. The molar enthalpy of vaporization for water is 44 kJ/mol and the boiling point
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.
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