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How is the wavelength of sound affected when
(a) a sound source moves toward a stationary observer, and
(b) the observer moves away from a stationary sound source? What is the effect when a system is driven in resonance? Is a particular frequency required? Explain.
some species of bacteria can oxidize nitrite to nitrate using the energy released by the transfer of electrons to oxygen to drive ATP synthesis. Given the E values below, calculate the max yield of ATP per mole of nitrite oxidized.
A large pond is 300m by 95m with an average depth of 2.5m. Assuming that the pond is saturated with oxygen, calculate the amount of sugar (C12H22O11) in kg that would be sufficient to completely consume the dissolved oxygen.
A student has a sample of the mixed salt PbCO3 X Pb(OH)2. In a mixed salt two compounds are mixed together in one crystal. X represents the mole ratio between the two compounds, and is usually a small whole number.
a 50 ml solution containing NaBr was treated with excess AgNo3 to precipitate 0.2146g of AgBr. what is the molarity of NaBr in the solution.
Problem- Gastric juice is made up of substances secreted from parietal cells, chief cells, and mucous-secreting cells. The cells secrete HCl, proteolytic enzyme zymogens, mucin, and intrinsic factor.
A sample of C3H8 Has 3.84X10^24 H atoms. a) how many carbons does the sample contain b) calculate the total mass of the sample
A gigantic balloon is filled to a pressure of 752 mm Hg at 12.5 ºC with pure helium gas. Once inflated, the balloon holds a total volume of 2.2 x 106 liters. How many grams of helium were used in this process?
calculate the concentration of i- in a solution obtained byshaking 0.19m ki with an excess of agcls? how do you do this
1.00 mol of glucose was dissolved in water to form 1.00 L of solution at 298 K and 1 bar. Calculate free energy of mixture. Data for water: density 1.00 g/cm3, molar mass 18.02 g/mol, ?fGo(H2O,l) = -237.13 kJ/mol.
calculate the ground state energy, the radius of the first Bohr orbit, and the energy and frequency associated with the n=1 to n=2 transition in a mesonic atom.
Describe how you would prepare the above buffer solution if you only had NaH2PO4, and a solution of NaOH. What other equipment would you need?
1)MgBr2 and Pb(NO3)2 2)CuSO4 and H2S write ionic equation (molecular reactions, ionic equations and net ionic equations indicating the spectator ions in these reactions)
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