Chemistry, 15.10.2019 02:30 sampurple123
Ahot-air dryer is used to reduce the moisture content of 2200 kg/min of soybeans from 0.18 w/w water to 0.13 w/w water. air is drawn from the atmosphere at 22°c, 760 mm hg, and 50% relative humidity ( 2 * 2 h o h o p p ). the air is heated and then passes through the dryer. the air leaves the dryer at 50°c and 15 mm hg (gauge). a sample of the air is drawn into a chamber and slowly cooled while keeping the pressure constant. a mist is observed to form on the mirror in the chamber at 35.5°c. a) what is the rate (kg/min) that water is removed from the soybeans? b) what is the volumetric flow rate of air entering the dryer to achieve this?
Answers: 3
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Chemistry, 22.06.2019 11:40
Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)
Answers: 1
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Answers: 1
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How can a mixture of salt water be separated into salt and water
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Ahot-air dryer is used to reduce the moisture content of 2200 kg/min of soybeans from 0.18 w/w water...
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