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You live on a busy street, but as a music lover, you want to reduce the traffic noise.
a.) If you install special sound-reflecting windows that reduce the sound intensity level by 25.0 dB, by what factor have you reduced the sound intensity?
b.) If, instead, you reduce the intensity by half, what change do you make in the sound intensity level? Express your answer in decibels.
What volume of glacial acetic acid (1.06g/ml) and what weigh of solid potassium acetate are required to prepare 5 liters of 0.2m acetate buffer, ph 5.0
What is the central atom for CO2, how many bonds are formed, is it polar or nonpolar, what's the direction of electronegativity
What is the FORMULA for the limiting reagent. What amount of the excess reagent remains after the reaction is complete. grams
For each of the following pairs of variables, state the law that applies and whether the relationship between them is direct or inverse. Also identify what must be constant:
While 92.0 grams of a nonionic compound were dissolved in 985 grams of water, the freezing point of the solution was found to be-4.05*C. Explain what is the molar mass of this nonionic compound
If a cord of wood is a stack of wood that measures 4.0ft x 4.0ft x 8.0ft. Explain what is the volume of this stack of wood in cubic centimeters
elemental sulphur occurs in the solid state as 8-membered rings arranged in rhombohedral crystal structure s8 which
1. Explain what is the percent composition of all the elements in the compound ammonium dihydrogen phosphate. 2. Explain what is the mass of phosphorus (in pounds) in a 25.0 lb quantity of sodium phosphate.
briefly describe your synthetic strategy. you may use any reagents of your choice. if any reagent you wish to use is unstable and has a small shelf-life
What fraction of O2 molecules at 298K has velocities between 410 and 420m/sec? What fraction of nitrogen molecules?
On specific heat and heat transfer, how does the water help us to disperse heat and regulate our body temperatures?
A gamma ray has a frequency of 3.5 x 1019Hz. Determine the wavelength of this radiation in nm and the energy of a photon of this radiation.
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