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The concentrationof the alkane C20H42 (FM= 282.55) in a particular sample in rain water is 0.2ppb. assume that the density of the rain water is close to 1.00 g/ml and find the molar concentration of C20H42.
Explain why gas chromatography usually ramp(increase) the oven temperature during an analysis
A covalent compound is composed of a nitrogen atom, a hydrogen atom, and a carbon atom. How many electrons should the Lewis structure of the covalent compound contain
The vapor pressure of water at 20oC is 17.5 mmHg. What is the vapor pressure of water (in mmHg) over a solution prepared from 258 g sucrose (C12H22O11) and 350 g water?
what is the empirical formula of a sample of iron-containing compound that is 22 iron 50.2 oxygen and 27.8 chlorine by
What is the value of the reaction quotient, Q, for the cell that is constructed from the two half-reactions when the Zn2+ concentration is 0.0100 M and the Ag+ concentration is 1.25 M
Calculate the volume occupied by 1.00 mol N2 using the van der Waals equation in the form of a virial expansion at (a) its critical temperature, (b) its Boyle temperature, and (c) its inversion temperature
The density of the hydrogen peroxide solution is 1.01 g/mL and the solution contains 3.40% H202 by mass. The vapor pressure of water at 24C is 22 mmHg. Based on this data and information calculate the molar volume at STP.
An aqueous solution containing 5.85g of an optically pure compound was diluted to 800.0mL with water and placed in a polarimeter tube 10.0cm long. The measured rotation was -5.93degrees at 25degrees C. Calculate the specific rotation of the compou..
a solution formed by dissolving 166.6 grams of common table sugar in 686.2 ml of h2o. compute the vapor pressure at 25
container a with 150ml contains a gas with an unknown pressure. container b with volume 250ml contains a gas under 628
Calculate the APF for (a) the simple cubic and (b) body centered cubic lattices as volume of atoms/volume of cell. (c) Which structure is more dense given atoms of equal mass? The edge length for simple cubic is 2r. Remember that each corner atom ..
What unusual aspect of water is responsible for it unique characteristics as both a liquid and as a solid? Give examples of how this property of water would affect food systems during processing.
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