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A textile finishing process involves drying a fabric that has been treated with a volatile solvent. The wet fabric entering the dryer contains 45% solvent, and the dried fabric contains 3% of the entering solvent. Solvent-free air enters the dryer at a rate of 8 pounds per pound of solvent -free fabric. The solvent has a molecular weight of 60.
Calculate the percentage of solvent in the dried fabric by weight; and the concentration of solvent in the dryer exhaust in mg/m^3 if the exhaust is at 160 deg F and 1 atm.
what is the concentration of a household ammonia cleaning solution if 49.90 ml of .5900M HCL is required to neutralize 25.00 ml of the solution?
The atomic mass of element X is 22.99 amu. A 19.98-g sample of X combines with 16.51 g of another element Y to form a compound XY. Calculate the atomic mass of Y.
an experiment requires 42.0 g of ethylene glycol a liquid whose density is 1.114 gml. rather than weigh the sample on a
If a 190 piece of gold (density =19.32 ) is hammered into a sheet measuring 2.21.0 , what is the average thickness of the sheet in meters?
Why are monochromators (prism or grating monochromators) used in scanning instruments as opposed to absorption filters
The bond angles in H3O+ are:? a) slightly less than 109.5o b) exactly 109.5o c) slightly less than 90o d) exactly 90o
What is the density of an object with a weight of 32 grams if it has a volume of 4 cubic centimeters
Given the following equation, how many grams of PbCO3 will dissolve when 5.0 L of 1.50 M H+ is added to 6.00 g of PbCO3
an alka-seltzer tablet contains 1.916 grams of sodium bicarbonate. using the formula h3c6h5o7 3nahco3-gt nac6h5o7 3h2o
suppose that after delivery several drops of the water cling to the inner wall of the pipet because the pipet wall is
An empty flask has a mass of 123.4 g. When the flask is filled with water, the mass is 211.6 g. If 10.0 g of zinc (d = 7.14 g/cm3) are added to the flask filled with water (and the sides of the flask are dried from the displaced water) what is the..
is an important oxidizing agent and a moderately strong acid. in a 0.1M solution ,[H+] = 3.8x10^-2M. Calculate the Ka and the pKa for periodic acid.
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