Chemistry, 12.03.2020 05:41 Rachelmontes1
A 25-kg iron block initially at 350 oC is quenched in an insulated tank that contains 100 kg of water at 18 oC. Assuming the water that vaporizes during the process condenses back in the tank, determine the total entropy change during this process.
Answers: 2
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Noble gases are the most reactive elements on the periodic table. a. true b. false
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How many moles of gas are present if p=11 atm, v=12l, t=185k?
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Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?
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Chemistry, 22.06.2019 14:00
The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.
Answers: 3
A 25-kg iron block initially at 350 oC is quenched in an insulated tank that contains 100 kg of wate...
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