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Give the structure that corresponds to the following molecular formula and 1H NMR spectrum: C7H12Cl2: ? 1.07 (integral = 6203, s); ? 2.28 (integral = 1402, d, J = 6 Hz); ? 5.77 (integral = 700, t, J
Alpha helices are a type of secondary structure in proteins. What is the length of a 41-kDa single-stranded ?-helical protein segment. Assume a mean residue mass of 110 Da.
For the following reactants, predict the products formed (if any) and write the balanced molecular equation, complete ionic equation and net ionic equation. Ca(s)+ HCI(aq)
Nuclear engineers use chlorine trifluoride in the processing of uranium fuel for power plants. This extremely reactive substance is formed as a gas in special metal containers by the reaction of ele
At a given temperature, 1.18 atm of F2 and 5.91 atm of Br2 are mixed and allowed to come to equilibrium. The equilibrium pressure of BrF is found to be 1.044 atm. Calculate Kp for the reaction at th
A 82.2 g sample of dinitrogen monoxide is confined in a 3.2 L vessel. What is the pressure (in atm) at 115°C?
A sample of chlorine gas is confined in a 8.4 L container at 287 torr and 27°C. How many moles of gas are present in the sample
Calculate the volume of a sample of carbon monoxide at -23°C and 289 torr if it occupies 3.65 L at 298 K and 732 torr
Which is the best acid to use in the preparation of a buffer with pH = 9.3?
Think back to what you learned in this course about solutions and intermolecular forces. Why don't these to "mix" together (in other words, make a homogenous solution) when combined. Why do they sep
Assuming the heat absorbed by the styrofoam is neglibible, calculate the expected final temperature. The specific heat of water is 4.184 J g-1 C-1.
Calculate the percent ionization of 7.4x10^-3 M butanoic acid in a solution containing 7.0x10^-2 M sodium butanoate
If 60.00 mL of water is added to 40.0 mL of 4.00 Molarity NaC1, what will the concentration of the new solution be
A 64 L sample of dry air is cooled from 137°C to -20.°C while the pressure is maintained at 2.85 atm. What is the final volume
Explain the impact of ionic size on the activity coefficient of a species. 1) give the correct trend. 2) give a complete mathematical explanation, 3) give a conceptual explanation.
You make 10-4 M solutions of NaOH and NaHCO3 and a 10-4.3 M solution of Na2CO3. You use pure distilled water that has been fully degassed.
In the lab you make 10-5.5 M solutions of HCl and of NaOH using pure distilled deionized water. What would be the pH after the solutions equilibrate with the atmosphere
A person inhales air richer in O2 and exhales air richer in CO2 and water vapor. During each hour of sleep, a person exhales a total of 300. L of this CO2-enriched and H2O-enriched air. (a) If the p
A sample of an unknown gas effuses in 11.3 min. An equal volume of H2 in the same apparatus at the same temperature and pressure effuses in 2.72 min. What is the molar mass of the unknown gas
When 36.6 L ammonia and 39.5 L oxygen gas at STP burn, nitrogen monoxide and water are produced. After the products return to STP, how many grams of nitrogen monoxide are present ............... g N
How many grams of phosphorus react with 38.1 L of O2 at STP to form tetraphosphorus decaoxide. P4(s) + 5 O2(g) P4O10(s)
Background: Lake Lianna is fed by two rivers, the Matthew and the Andrew. You have made careful water chemistry measurements throughout the year and found that the two rivers have the following pH a