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The flashlight in the photo does not use batteries.Instead, you move a lever, which turns a geared mechanismand finally results in light from the bulb. What type of energy is used to move the lever? What type or types of energy are produced?
The ratio of Fe^2+ to Fe^3+ concentrations in a solution is 1.0 x 10^3. ([Fe^2+]/[Fe^3+]) = 1.0 x 10^3. Calculate the potential of the solution relative to the saturated Ag/AgCl reference electrode, Eref = 0.204. E^0 Fe^3+/Fe^2+ = +0.771
An industrial flavor-enhancing process requires that a butter-flavored food be heated briefly at 200 degrees Celsius. Explain how long can the food be heated at this temperature and retain 68% of its butter flavor?
Write the reactions for the preparation of the diaonuim salt for the coupling of the salt with the sodium salt of 2-napthol.
Explain using Hooke's law why the H-X stretches absorb higher frequency energy than C-X stretches. (X=C,N,O)
Calculate the molarity and the molality of an NH solution made up of 28.0 g of NH in 70.0 g of water. The density of the solution is 0.982 g.
What is the molecular mass of a gas that diffuses through a porous membrane 1.26 times faster than Kr
A metallic solid with atoms in a face-centered cubic unit cell with an edge length of 385 pm has a density of 6.84 g/cm3. Calculate the atomic radius of the metal.
sodium-24 is a radioistope with half life of 15 hors. a sample of pure sodium-24 has an inital mas of 400.0g. what mass
A person uses 750 kcal on a long walk. Calculate the energy used for the walk in each of the following energy units
what is the amount of heat kj required if 64.0 kg of h2o is heated from 25degc to 85degc? 200.0 g al c 0.900 at
A total of 5 moles of gas react together to produce 4 moles of gas. They are at equilibrium and the process is exothermic. It may be given as follows
The compound she isolated was not 4-chlorobenzoic acid. What was the product and why was it obtained? Suggest a suitable route to the desired product. If possible just a to the point details about how you got the answer
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