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The change in heat for the solution proecss when solid sodium hydroxide dissolves in water is 44.4 kj/mol. when a 13.9 g sample of naoh dissolves in 250.0 g of water in a coffee cup calorimeter, the temperature increases from 23.0 degrees C to how many degrees C?
in the synthesis of divanillin the first step in the mechanism of this reaction involving vanillin is the formation of phenoxy radical by abstraction of the phenoic H atom
What volume (in ml) of coffee should be diluted to 25ml prior to analysis using only standard transfer pipets with integer values from 1-10ml
The molar mass of compound is measured to be 33.4, 35.2, 34.1, 33.9 g/mol in four trials. What is the avg molar mass & calculate standard deviation and %RSD for determination of the molar mass
Pure water, .120 m C6H12O6, .050 m LiBr and .050m Zn(NO3)2....which has the highest vapor pressure, highest boiling point and highest freezing point
The synthesis of imines and enamines typically occurs under mildly acidic conditions, yet the reaction that you will perform in this experiment is successful without the need of such acid. Why
What is the mole fraction of methane in the mixture? (Assume that the water produced by the combustion is in the gaseous state.)
A 7.45 g sample of solid LiOH is completely dissolved in 120.00 g of water at 23.25°C contained in a calorimeter with a heat capacity of 11.7 J/°C. The specific heat capacity of the solution produced was 4.20 J/g•°C
Describe the general approaches that are used to determine the mechanism of catalysis of an enzyme. Include in the approaches how covalent modification
10.00mL aliquots of an unknown containing element X was mixed with aliquots of a standard solution of element X for atomic absorption. The standard solution contained 1786.50ug X/mL.
Four different amino acids can be combined in different sequences to form how many different tetrapeptides?
How many kilograms of chalcopyrite must be mined to obtain 320.g of pure \rm Cu? Express your answer to three significant figures and include the appropriate units.
The student then adds more water until the solution volume becomes 1.0 L Write the eqn for each large-extent B/L A/B rxn which occurred on making this mixture. Do this by starting with the rxn that involves the strongest B/L A with the strongest B..
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