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What is the concentration of hydrochloric acid in a solution prepared by mixing 0.250 L of 10.0 mol L-1 hydrochloric acid with enough water to make the volume up to 5.00L?
Reactants A and B are present in a closed container. Predict how each of the following changes to the reaction system will affect the rate and rate constant. EXPLAIN
A solution of Fe(III) ions is formed by first dissolving 5.58g of pure iron wire in excess hydrochloric acid and then making the final volume of the solution to 1.00L by adding an appropriate amount
Calculate the mass of one oxygen atom and determine the number of oxygen atoms in a 10.00g sample of the element (recall Avegadro's number is 6.022 * 10^23).
Radon (222Rn), a dense, noble gas, is commonly found in basements in some areas of the United States. Radon is a daughter of 238U decay. Which statement about radon is not correct?
Suppose that a rock contains 0.539 mg of 206Pb. If the current rock specimen contains 2.035 mg of 238U, how many mg of 238U were in the original rock specimen?
What volume and mass of steam at 100.°C and 1.00 atm would, during condensation, release the same amount of heat as 100. cm3 of liquid water during freezing?
For g orbitals, the value of is 4. What is the lowest value of n for which g orbitals could exist? What are the possible values of m? How many electrons could a set of g orbitals hold?
Calculate the maximum wavelength of light that will ionize lead. nm Is light with a wavelength of 115 nm capable of ionizing a lead atom (removing an electron) in the gas phase?
it is estimated that uranium is relatively common in the earth's crust occurring in amounts of 4 g per metric ton. at this concentration what mass of uranium is present in 1.0 mg of the earth's crus
The work function of an element is the energy required to remove an electron from the surface of the solid element. What is the maximum wavelength of light that can remove an electron from an atom on
How many kilograms of methane (CH4) are in perfectly insulated piston with the following properties: Volume = 2 cubic meters.
How many grams of sodium carbonate, silver nitrate, silver carbonate, and sodium nitrate are present after the reaction is complete?
If the density of commercial bleach is 1.084 g/mL, how many mL of 0.150 M sodium thiosulfate is required to reach the end point in a titration similar to the one performed in this experiment, if a s
how much heat is produced in burning one mole of C2H2 under standard conditions if both reactanta and products are broght to 298K.
A 25.00 g sample of a solid is placed in a graduated cylinder and then the cylinder is filled to the 50.0 mL mark with benzene. The mass of benzene and solid together is 58.80 g. Assuming that the s
Use the principles of electrochemistry to answer these questions. Why is a salt bridge connecting two compartments of a galvanic cell necessary for the operation of the cell?
Calculate the molar absorptivity of K2Cr2O7 at 455 nm, given that 36.5 mg dissolved in& ; 500.0 mL exhibits 12.0% transmittance at 455 nm in a 2.000 cm cell.
Explain the following observations using principles of nuclear chemistry: Gamma rays penetrate farther into the human body than alpha or beta rays.
If a mixture of the two exhibits& ; absorbances of 0.402 at 254nm and 0.432 at 267nm, what is the concentration of each& ; compound?
Pure gold can be made into extremely thin sheets called gold leaf. What is the thickness of the gold leaf in cm? ...in nanometers?
The hypothesis that North America was settled prior to the end of the last glaciation. You analyse the artifact and find that it has a specific activity of 2.2 dpm/g. How old is the artifact?
A compound of molecular weight 280 g/mol a concentration of 15.0 micrograms per ml absorbs 65 percent of radiation at a certain wavelength in a 2 cm cell. Calculate it molar absorptivity at a wavel
If he uses the combustion of natural gas (which is exothermic) to heat the water, how much natural gas will he need to burn? Natural gas produces 49.3 kJ of heat per gram.
The density of toluene at the temperature of the experiment is 0.8035 g/ml. Calculate the density of the solid in g/cm^3.