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Calculate the final temperature when a 20.4 gram sample of ice at 0oC is placed into a styrofoam cup containing 111 grams of water at 72.7 oC. Assume that there is no loss or gain of heat from the surroundings. Calculate the entropy change that occurs during this process.
Ammonia reacts with oxygen gas to produce water and nitrogen gas. What mass of oxygen gas must be used to react with 19g of ammonia
The reaction between hydrochloric acid and zinc metal produces hydrogen gas and zinc chloride. If 50g of each hydrochloric acid and zinc are mixed
Explain the following observations. 1. Aziridines, compounds that contain nitrogen in a three-membered ring, undergo pyramidal inversion much more slowly than do other alkylamines
Draw all possible isomers for the molecule having the formula C7H7C1. The molecule contains one benzene ring.
The specific heat cacpacity of solid copper metal is 0.385/Jg-K. How many joules of heat are needed to raise the temperature of a 1.55-kg block of copper from 33.0 0C to 77.5 0C
Suppose that 1.08 g of rubbing alcohol (C3H8O) evaporates from a 75.0 g aluminum block.If the aluminum block is initially at 25 C, what is the final temperature of the block
The product of the complete hydrolysis contained 1.8 mg of the compound shown below, and no other 2,4-dinitrophenyl derivatives of the ?-amino groups of other amino acids could be found How many polypeptide chains are in this protein?
To obtain the same antifreeze protection requires 76 g of propylene glycol to replace each 62 g of ethylene glycol. Calculate the mass of propylene glycol required to replace
A 50.0 mL sample of vinegar (density = 1.06 g/mL) was diluted to 500.0 mL. Titration of a 50.0 mL aliquot of this solution required 42.5 mL of 0.0900 M NaOH to reach the end point. Determin the acid content of the vinegar as wt. % acetic acid.
What are ALL of the intermolecular forces of NaNO3? Choices (pick all that apply)
How much energy (in kilojoules) is needed to heat 3.20 of ice from -14.5 C to 23.5 C? The heat of fusion of water is 6.01, KJ/Mol and the molar heat capacity is 36.6 J/
Calculate the minimum concentration of Cr3+ that must be added to 0.095 M NaF in order to initiate a precipitate of chromium(III) fluoride. (For CrF3, Ksp = 6.6 × 10-11.)
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