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Which of the four main categories of biological compounds-carbohydrates, lipids, proteins, and nucleic acids-contains the highest concentration of calories?
Which category should be most restricted during dieting? Why?
For 0.51 M HCN (Ka=6.2 x 10-10), mark the major species found in the solution. H+ , HCN , CN-, H2O , OH, Now calculate the pH of the 0.51 M HCN solution (Ka= 6.2 x 10-10).
Write a balanced hydrolysis equation to show why solutions of aluminum chloride are acidic. (Hint; Al3+(aq) ions can be written Al(H2O)63+(aq).)
A 29.0-g sample of water at 260. K is mixed with 51.0 g water at 340. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
One mole of potassium dichromate completely oxidises the following number of moles of ferrous sulphate in acidic medium
how much energy in kilojoules is required to change 47.6 g of ice at 0 degrees celcius to liquid water at the same temperature in kilocalories?
In each reaction box, place the best reagent and conditions from the list below. (A reagent may be used more than once.) acetylene to 3-hexyne-1-ol
If 3.0 L of oxygen gas at 177°C is cooled at constant pressure until the volume becomes 1.50 L, then what is the final temperature
A mixture of 100 g of K2Cr2O7 and 200 g of water is stirred at 60 C until no more of the salt dissolves. The resulting solution is poured off, leaving the undissolved solid behind.
What enone product would you expect to obtain from intramolecular aldol condensation of 3-methylhexanedial
The equivalence point was reached by adding 11.62 ml of NaOH from the buret. What is the molar mass of this unknown acid
Calculate the enthalpy change associated with the conversion of 25.0 grams of ice at -4.00°C to water vapor at 110.0°C. The specific heats of ice, water, and steam are 2.09 J/g-K, 4.18 J/g-K, and 1.84 J/g-K
A shelf containing several chemicals (Salicylic acid, 4-(4-Hydroxyphenyl)butan-2-one {a.k.a. Raspberry Ketone} and 4-methylaniline) fell and the vials shattered.
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