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Question- The molality of a sample is 0.01243 g/kg and the mass of the solute is 2.93 g and the mass of the solvent is 954 g. What is the molar mass of the sample in g/mol?
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If a solution contains 0.60 mol of OH^-, how many moles of H^+ would be required to reach the equivalence point in a titration?
When 2.70 g of this compound is added to 250.0 mL of water, the temperature rises from 23.2°C to 28.8°C. Calculate the heat of reaction (qrxn = ?Hrxn) per gram of compound (in kJ/g).
For each of the compounds that forms hydrogen bonds, draw a diagram of the two molecules using a dotted line to indicate where the hydrogen bonding will occur.
Problem- Consider the exothermic combustion of coal. Which of the following could increase the rate of reaction?
prepare 100 mL each of five standard solutions: 2.00 x 10-5, 5.00 x 10-5, 1.00 x 10-4, 2.00 x 10-4, and 5.00 x 10-4 M. These will serve as your analytical standards, which means that their phosphate concentrations must be precisely known.
Calculate the energy that must be transferred as heat to a van der Waals gas that expands reversibly and isothermally from Vi to Vf.
What is the de Broglie wavelength (in nm) associated with a 2.50-g Ping Pong ball traveling 35mph?
a photomicrograph was taken of a specimen at a magnification of 100x and it was determined that the average number of
Discuss the Hazard classification of areas; class, group, division with respect to flammable gas atmosphere in a chemical process industry and Outline the Principles and standards of intrinsic safety, techniques in the design, use of intrinsically..
Using the lewis structure predict the geometrical structures of the following ions and state the hybridization of the central atom.
what antibiotic woiuld you put in an agar plate to ensure that the cells of a bacterial colony contain the plasmid withou an insert? c) which phenotype will indicate the presence of plasmids that contain human DNA fragments?
an electron is confined to a linear region with a length of the same orderas the diameter of an atom (about 100 pm)
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