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Water (2770 g) is heated until it just begins to boil. If the water absorbs 5.35 x 10^5 J of heat in the process, what was the initial temperature of the water
If the protein has a molecular weight of 15,000, express its initial concentration in umoles/ml and in umoles/ul. If we want 2 umoles of the protein for a reaction, how much of the original solution
An aqueous solution is 5.50 % by mass ammonia, NH3, and has a density of 0.975 g/mL. What is the mole fraction of ammonia in the solution?
An empty Erlenmeyer flask weighs 246.3 g. When filled with water (d = 1.00 g/cm3), the flask and its contents weigh 495.0 g. (a) What is the flask's volume? (b) How much does the flask weigh when fi
Sketch the titration curve for carbonic acid H2CO3. Plot pH on the ordinate axis and relative equivalents of base added on the abscissa axis. Using this figure, indicate what the major species of th
Construct a simulated 1H NMR spectrum, including proton integrations, for CH3CHCl2. Drag the appropriate splitting patterns to the approximate chemical shift positions; place the integration values
Splitting patterns and integrations may be used more than once, or not at all, as needed. Likewise, some bins might remain blank. Note that peak heights are arbitrary and do not indicate proton inte
Give the structure that corresponds to the following molecular formula and 1H NMR spectrum: C7H16O:
What pH is needed such that the maximum [Mg^(2+)] in solution is 2x10^-4 M given the equilibrium: Mg(OH)2(s) <=> Mg^(2+) + 2OH^(-)
If 23.7 grams of an aqueous solution of barium bromide, BaBr2, contains 6.00 grams of barium bromide, what is the percentage by mass of barium bromide in the solution?
C2H4 is emitted by fruits and is responsible for their ripening. Explain why a bunch of bananas ripen faster when placed in a paper bag.
A tripeptide made from the amino acids alanine, phenylalanine, and threonine is shown in this Jmol molecule. If the convention for naming peptides
distilled Solution D: 9.08 (m/v) glucose Solution E: 5.0 (m/v) glucose and 0.9 (m/v) Where does each solution go under 1. Crenation, 2. Hemolysis, 3. Neither. Each solution should be placed under on
Calculate the change in internal energy of the following system: a 100.0- bar of gold is heated from 25 to 50 during which it absorbs 322 of heat. Assume the volume of the gold bar remains constant.
A piece of dry ice, solid CO2, weighing 10.0 g is placed in an evacuated 0.800 L bottle at 550 degrees Celsius. The bottle is capped, and the dry ice changes to gas. What is the final pressure insid
Calculate the 95% Confidence interval is the measured standard deviation is not a good estimate of the population standard deviation.
Starting with Hamilton's equation of motion for classical mechanics, p^2/(2m) + V=E , obtain Newton's equation of motion, F= ma.
what is the value of ni for an electron that emits a photon of wavelength 95.04 nm when it returns to grount state in a th H atom
dependent Schrodinger equations of a particle with mass m confined in the one-dimensional potential (1/2)kx^2 , where k is some constant.
Suggest mathematical functions that represent a sinusoidal wave of amplitude A, frequency v, and wavelength ? .2. Justify the mathematical form of the linear momentum operator, (-ih)d/dx, by applyin
All of the following are characteristics of fusion EXCEPT A) Two small nuclei combine to form a larger nucleus. B) Large amounts of toxic nuclear waste are produced during a fusion reaction.
Oxygen-15 has a half-life of 124 seconds. You begin with a 429 mg sample of oxygen-15. You wait 6.20 minutes. What is the total amount of time in seconds
Cesium-137 has a half-life of 30 years. You begin with a 20.0 g sample of Cs-137. How many half-lives occur if you wait a total of 60 years?
Suggest mathematical functions that represent a sinusoidal wave of amplitude A, frequency v, and wavelength
List the similarities and differences between the classical - and - quantum-mechanical equations of motion. How does the latter account for the quantization of energy and wave-particle duality