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7.51 kilojoules of heat is added to a 22.8 g piece of copper, intially at 51 degrees celsius. What will be the final temperature of the copper (in degrees celsius)? (specific heat of copper = 0.385
What is the major aldol product from the reaction of excess 2,2-dimethylpropanal with etanal? What are the possible aldol product(s) from the reaction of ethanal and methanal?
Fats and oils are also converted commercially into long-chain alcohols. What is the best and most direct reaction by which to accomplish this?
The heat of vaporization of water is 40.7 kJ/mol. How many kilojoules of heat must be provided to convert 12.00 g of liquid water at 100°C into 12.00 g of steam at 100°C?
Why is soap not suitable for laundry use with hard water,whereas, the synthetic detergent is? What is the chemicaql composition of peanut oil?
The concentration of a chemical degrades in water according tofirst-order kinetics. The degradation constant is 0.2/day. If theinitial concentration is 100 mg/L, how many days are required for the
A current of 250 A flows for 24 hours at an anode where [Mn]2+ (aq)is being converted to MnO2 (s). What mass of MnO2 is deposited at this anode?
The radioactive isotope tritium decays with a first-order rate constant k of 0.056 year-1. What fraction of the tritiuminitially in a sample is still present 30 years later?
What is the "exact" alkalinity of water ( in mg/L asCaCO3 ) that contains 0.6580 mg/L of bicarbonate, as theion, at a pH of 5.66?
Why is the separation of mixtures into pure or relatively pure substances so important when performing a chemical analysis?
Calculate the mass of KI in grams required to prepare 5.00x 102 mL of a 2.80 M solution. How would you prepare 60.0 mL of 0.200 M HNO3from a stock solution of 4.00 M HNO3?
Consider an electrochemical cell constructed from the followinghalf cells, linked by an external circuit and by a KCl salt bridge.1. an Al(s) electrode in 1.0 M Al(NO3)3solution 2. an Pb(s) electrod
Determine the amount of heat emitted when each of the following completely reacts (assume that there is more than enough of the other reactant):
The 14C activity of some ancient Peruvian corn was foundto be 10 disintergrations per minute per gram of carbon. If present day plant life shows 15 dpm/g, how old is the Peruvian corn? Thehalf
In the complex ion [ML6]n+, Mn+has seven d electrons and L is a strong field ligand. According to crystal field theory, the magnetic properties of the complex ion correspond to how many unpaired el
Calculate the de Brogile wavelength of a baseball of mass 0.17kg that is thrown with a velocity of 30 m/s.(me(mass of electron)= 9.1093819E-11)
This reactiongenerates a large amount of heat and gaseous products. It is the sudden formation of these gases , together with their rapidexpansion, that produces the explosion.
A chemist wants to prepare 0.25 M HCl. Commercial HCl is 12.4 M. How many millimeters of the commercial acid does the chemist require to make up 1.50 L of the dilute acid?
A flask contains 49.8 mL of 0.150 M calcium hydroxide. How many millimeters of 0.350 M sodium carbonate are required to react completely with the calcium hydroxide?
A 3.33 gram sample of iron ore is transformed to a solution ofiron (II) sulfate and this solution is titrated with 0.150 Mpotassium dichromate.
During the developing process of black and white film, silverbromide is removed from photographic film by the fixer. The majorcomponent of the fixer is sodium thiosulfate.
Menthol is a flavoring agent extracted from peppermintoil. It contains C, H, and O. In one combustion analysis,10.00 mg of the substance yields 11.53 mg H2O and 28.16mg CO2. What is the empirical fo
Calculate the quantities in milliliters of 4-nitrobennzaldehyde and 3-pentanone that will need to be combinedin order to prepare 10g of the solid product
Cinnamicalcohol is used mainly in perfumery. Particularly in soapsand cosmetics. Its molecular formula isC9H10O Calculate the % composition by mass of C, H and O incinnamic alcohol.