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1.75 kg/s of air at 300. K enters the compressor of a reversed Brayton cycle heat pump. The isentropic pressure ratio of the compressor is 3.00 to 1, and the inlet temperature of the expander is 335 K.
The isentropic efficiencies of the compressor and expander are 91.0% and 85.0%, respectively. Determine
a. The actual power output from the expander.
b. The actual power input to the compressor.
c. The coefficient of performance of the unit.
A 10.0 mL aliquot of the solution is titrated with a standard 0.101 M KSCN solution, requiring 7.0 mL to reach the red Fe(SCN)2+ end point. Calculate the percent mass of silver in the sample.
A 1.85 g sample of a compound containing merely carbon and hydrogen is combusted to give 5.43 g Co2 and 3.33 g H20. Explain what is the empirical formula of the compound
A solution of M(NO3)2 is electrolyzed. When a constant current of 2.50 amperes is applied for 35.0 minutes, 3.06 grams of the metal M is deposited. calculate the molar mass of M and identify the metal
if 50.0 g of copperi oxide and 25.8g of copperisulfide are initially present determmine the teoretical yield of copper.
Question- If the 8 hour Time Weighted Average exposure are determined by charcoal tube sampling to be 60ppm toluene, 20ppm methylene chloride, and 20 ppm turpentine, using OSHA's personel exposure limits, has there been an over exposure
How many grams of water are formed when 5.00 g of butanol combust with excess oxygen according to the reaction shown below?
Draw resonanc contributors for the following species. Indicate which are major contributors and which are minor contributors to the resonance hybrid:
A chemist decided to analyze the mixture by dehydrating it by heating it to 120 degrees Celsius for 12 hours. If a 5.327 g sample weighed 4.281 g after dehydration, what is the percentage of CaCO3 in the original hydrated sample
A mixture of carbon and sulfur has a mass of 9.0g . Complete combustion with excess O2 gives 23.0g of a mixture of CO2and SO2. Find the mass of sulfur in the original mixture.
Derive a titration curve for 50.00mL of 0.0100 M Sr2+ with 0.0200 M EDTA in a solution buffered to pH 11.0. Compute pSr values after the addition of 0.00, 10.00, 24.00, 24.90, 25.00, 25.10, 26.00 and 30.00mL of titrant.
What must the concentration be, of each member of the buffering acid/base pair, if the reaction is expected to release 0.1 millimoles of H+?
calcium phosphide reacts with water to produce calcium hydroxide and phosphine. a if you start with 15.0 g of calcium
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