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A rocket motor is designed to give 10, 000 N thrust at 10, 000 m altitude. The combustion chamber pressure and temperature are 2 × 106 P a and 2800°K, respectively. The gases exit the combustion chamber through a Laval nozzle. Find the exit Mach number, and the cross-sectional areas of the exit and the throat of the nozzle. Assume the nozzle flow is isentropic and one-dimensional, and that the ratio of specific heats γ for the combustion gases is 1.32.
Have a 2.5L sol'n made up of 0.05M Cl-, 0.0002M Br-, and 0.100M CrO4. you slowly add drops of a 0.5M AgNO3 sol'n. ksp for AgCl=1.8E-10, for AgBr=4E-13, and for Ag2CrO4=1.2E-12
Question- CCl2F2 is considered to be environmentally safe and is used as a refrigerant. The heat of vaporization of CCl2F2 is 289 J/g.
One of the students in lab decided to use two fractionating columns (one on top of the other) instead of just one. How would this: a) affect the separation between hexane and heptane?
Please respond to ONE of the below questions in detail. These questions are taken from Sam Kean's "Questions and Topics for Discussion". Your response needs to be 1-2 pages long, or approximately 700-900 words. Consider the question and articulat..
How many moles of gas are contained in a 50.0 L cylinder at a pressure of 100.0 atm and a temperature of 35.0 °C? If the gas weighs 79.14 g, what is its molecular weight?
in the procedure for determining the fragrances it suggests that the organic layer dropped onto the watch glass should
What chemical reaction (formula) is involved in the thermal decomposition of ammonium persulfate (NH42S2O8)
a 1.0cm3 sample of lead and a 1.0cm3 of glass. I drop each in a separate beaker of water. How do the volumes of water that are displaced by the samples compare?
Explain A solution containing 27.55 mg of an unknown protein per 25.0 mL of solution was found to have an osmotic pressure of 3.22 torr at 25.0oC. Define what is the molar mass of the protein
A solution is prepared by adding 18mL of 0.200 M Fe(NO3)3 [iron (III) nitrate] and 2mL of 0.0020 M KSCN. Compute the initial concentrations of Fe3+ and SCN- in the solution
An unknown solution containing Yellow five dyes displays an absorbance reading of 0.628. Explain the molar extinction coefficient for Yellow 5 dye is 27300 L/mol cm. Explain what is the concentration (in M) of Yellow five in the unknown solution
N2 + 3H2 -> 2NH3 . 28.0 grams of N2 and 5.04 grams of H2 are reacted, producing 17.8 grams of NH3. What is the percent yield?
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