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What is the velocity of a first-order reaction when the reactant concentration is 6 x 10-2 M and the rate constant is 8 x 103 sec-1?
a 11.7 ml sample of a hcl solution has a ph of 2.000. what volume of water must be added to change the ph to
A sample of an unknown gas with a mass of 3.24 g occupies a volume of 1.88 L at a pressure of 748 mmHg and a temperature of 20.0°C. If the unknown gas is composed of 2.78 g of carbon and the rest is hydrogen, what is its molecular formula
Write a balanced chemical equation for the reaction of 4-Nitrobenzaldehyde and sodium borohydride (NaBH4). If 0.21 g of 4-nitrobenzaldehyde dissolved in 10 mL of methanol is mixed with 0.14 g of sodium borohydride, what is the theoretical yield?
compute the pressure in atmospheres using the van der waals equation exerted by waterh2o of 23.93 grams at 36.11 degree
what are the goals of this project. please answers have to be related to chemistry and specifically to this experiment.
Deal gases can be defined in terms of microscopic assumptions, assumptions about the values of macroscopic measurements or an equation of state
Calculate the pH for each of the following cases in the titration of 25.0 mL of 0.230 M pyridine, C5H5N(aq) with 0.230 M HBr(aq):
Which of the followling molecules would have resonance structures. Select all that apply. (You should draw all resonance structures for the molecule(s). Answer a. NI3 b. O3 c. CCl4 d. CH3NH2 e. NO3-
He begins to characterize this potentially novel molecule by dissolving 9.9 mg of it in 855 mg of cyclohexane and finds the melting point of the resulting solution is 6.30C.
Alkanes are organic molecules that contain only carbon and hydrogen atoms connected through single bonds. In the IUPAC naming system, all alkanes end in the suffix ane and begin with a prefix determined by the number of carbon atoms in the molecul..
a student measured 50.0 ml of a salt water solution (density=1.021 g/ml) into a flask. The Cl minus in the measured sample required 16.67 ml of 1.0466 M AgNO3 solution to reach the end point.
High-purity benzoic acid (C6H5COOH; delta H rxn for combustion= -3227 KJ/mol) is used as a standard for calibrating bomb calorimeters. A 1.221-g sample burns in a calorimeter
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