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A certain copper ore contains 2.98% of Cu2S by mass, andthe remainder of the ore contains no copper. In 1991, a singleopen-air smelt furnace heated 32000 tons of this ore.
A sample of an unknown biochemical compound is found to have a percent composition of 57.14% carbon, 6.17% hydrogen, 9.52% nitrogen and the balance oxygen. What is the empirical formula for this co
Calculate the percentage of empty space in 1 mol of water at25 Celcius. Obtain the density. The volume of amolecule of water can be taken as the sum of the volume of the twohydrogen atoms and the ox
A total of 250.0 g of ice melts.If the same amount of energy absorbed by the ice while melting wasadded to water at 100 oC, how many grams of this hotwater could be vaparized?
Laundry bleach is a solution of hypochlorus acid (HClO). To determine the HClO content of bleach, an aqueous sulfide salt is added to the bleach solution. The balanced equation for the reaction is:
What is the difference between structural isomers and stereoisomers? Would you give me some examples with Organic ChemistryDiagram if you could ?
On the flow sheet below, two hydrocarbon streams(A and B) of different composition are combined in a mixer to formstream C which will be sent for further refining.
A substance absorbs at 600 nm and 4000 nm. What type of energy transition most likely accounts for each of these absorption processes?
Suppose a refrigerator is designed based on the Joule-Thompsoneffect. What characteristics (e.g., conduit design,type of gas, quantity of gas flow) determine how much heat can be removed from the su
How many grams of sucrose (molecular weight = 342.3g/mol) would you dissolve in 100 ml to geta 52% solution? 50 ml of a 12% solution?
Magnesium has three naturally occurring isotopes, 24Mg(isotopic mass 23.9850 amu, abundance 78.99%), 25Mg(isotopic mass 24.9858 amu, abundance 10.00%), and 26Mg(isotopic mass 25.9826 amu, abundance
How long would it take to count 1 billion tiny,invisible objects from a bottle of these objects if you couldn't see one with an optical microscope but knew that each one weighed 0.00000001 gram?
When solid sodium bicarbonate is placed on an acetic acid solution they react to form water, carbon dioxide, and sodium acetate.
Calculate the number of moles of Cl atoms in 0.388 gC2H4Cl2. Portland cement contains some SiO2. Calculate the masspercent composition of silicon in this compound.
If 8.000 grams of copper atoms is weighed out on balancewith an error of +/- 0.002g , how many atoms of copper couldyou be "off" by. Show your work in dimensional analysis.
The energy levels the electron can occupy in the Be3+ion can be calculated using the energy level equation. Calculate the wave length (nm) of the photon absorbed when the electron goesfrom a n= 3.00
What mass of AgNO3 (169.9 g/mol) is needed to convert 2.33 g Na2CO3 (106.0 g/mol) to Ag2CO3? Or for the reaction to proceed to completion?
One mole of water, intially at 50 degrees celcius is heated to140 degrees celcius at a constant pressure of 1.00 atm. Calcualte the work for this process, assume idea gas behavior.
At a prominent state hospital, a 45-year-old woman is receiving a ‘combined modality' treatment for the initial stage of breast cancer. State the two aspects included in this treatment. State
A seed crystal of diameter D (mm) is placed in a solution ofdissolved salt, and new crystals are observed to form at a constantrate r (cyrstalsmin-1).
A 1.00-L gas sample at 100. degrees Celsius and 600. torr contains 50.0% helium and 50.0% xenon by mass. What are the partial pressures of the individual gases?
An open-end mercury manometer is connected to a low pressurepipeline that supplies a gas to a laboratory. Because paint wasspilled on the arm connected to the line during a laboratoryrenovation, it
If an open-tube manometer is open to the atmosphere (760 torr), themercury levels are equal. What is the pressure in the flask when agas is contained in the inside in torr when h=118 and 215.
Calculate the approximate alkalinity (milligrams per literCaCO3) for water containing 120 mg/L of bicarbonate ionand 15 mg/L of carbonate ion.
In the Hall-Heroult process, anhydrous aluminum oxide isreduced to aluminum according to the chemical equation: 2Al2O3 (s) ---> 4 Al (l) + 3 O2(g) Calculate the mass of aluminum oxide reacted if