Chemistry
Chemistry, 09.07.2019 15:30, nsaduadhq69831

What solvent should you use to measure the density of naphthalene acid?

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Chemistry, 02.07.2019 06:20, skyvargasov9cad
What solvent would you use to measure the density of naphthalene?
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Chemistry, 05.07.2019 21:20, tioneetionee2188
Athin sheet of naphthalene 0.254 cm thick and 10.2 cm square is place in an air stream parallel to the direction of flow. the air is at 0 °c and 1.0 atm and is moving in laminar flow with a uniform velocity of 15.2 m/s. for how long, in hours, must the sheet be exposed to the air stream before one-quarter of its mass will have sublimed? assume the upper and lower surfaces remain flat at all times. the molecular diffusion coefficient for the air naphthalene system is 185 cm /h and the schmidt number is 2.57 under the conditions given in the problem. the vapor pressure of naphthalene at 0 °c is 0.0059 mmhg. neglect sublimation from the edges. the kinematic viscosity of air can be assumed by be 13.28 x 10 m'/s. the density of naphthalene is 1152 kg/mi
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Chemistry, 13.09.2019 21:20, vpowell5371
A1.75-cm diameter naphthalene mothball is suspended in an air stream at 280 k, 1.0 atm, and constant velocity of 1.4 m/s. solid naphthalene exerts a vapor pressure of 2.8 pa at 280 k. consequently, the naphthalene very slowly sublimes into the passing air stream, with the rate limited by convective mass transfer. the density of solid naphthalene is 1.14 g/cm3, and the molecular weight is 128 g/mole. a. what is the initial evaporation rate of naphthalene mothball? b. how long will it take for the mothball to shrink to half of its original diameter? remember: as the mothball shrinks, its diameter is decreasing, which in turn affects the reynolds and sherwood numbers.
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