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Does doubling the decibels of a sound intensity level double the intensity? Explain. Why is lightning seen before thunder is heard? Under what circumstances would sound have
(a) a Doppler "blueshift" and
(b) a Doppler "redshift"?
The pH of a 1.0 X 10^-7 M HCl aqueous solution is 6.79, and not 7.00 as you might expect with a simple pH = -log[H3O+] calculation. Propose an explanation for this phenomenon.
Calculate the unknown concentration of toluene using the calibration curve graph provided and explain your calculation?
verify that the 2s wavefunction for hydrogen is normalized. use the wavefunction for the 1s orbital to find the expression value for r
The frequency factor as well as the activation energy for a chemical reaction are A=8.0x10-12 cm3/(molecule*s) and Ea=15.7 kJ/mol at 309 K, respectively. Find out the rate constant for this reaction at 309 K. Give answer in cm3/(molecule*s)
A cylinder is labeled \"PENTANE.\" When the gas inside the cylinder is monochlorinated, five isomers of formula C5H11Cl result. Was the gas pure n-pentane, pure isopentane, pure neopentane, or a mixture of two or all three of these
Define if 4.1 g of Pb(NO3)2 is added to enough water to make a 100.0 mL solution, explain what is the final concentration of free nitrate ions (NO3-)
A gas expands and does P-V work on the surroundings equal to 259 J. At the same time, it absorbs 216 J of heat from the surroundings. What is the change in energy of the system?
The atomic mass of element X is 33.42 amu. A 21.83-g sample of X combines with 80.32 g of another element Y to form a compound XY. Calculate the atomic mass of Y.
The bubble-point pressure of the 40°API oil plus 1110scf/STB of gas produced from this field was measured as 3460 psig at 263°F. What type of reservoir fluid is in this reservoir? Is the reservoir oil saturated or undersaturated? How do you know?
What evidence do you have that your product consists of a single geometric isomer or is a mixture of isomers? Does the melting point give such information
Determine how many grams of Potassium Sulfate can be formed from 150.0 grams of potassium hydroxide with sufficient sulphuric acid H2SO4?
When solid sodium hydroxide is added to water, the temp increases... is it endo or exothermic?
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