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Find the real activity of the anions for solution of 1M H3PO4, which is at 25 degree celsius and assume that all ions present follow the Debye-Huckel limiting law at that concentration (A = 0.509). Besides, it is given that pKa = 2.14 and density of 1M H3PO4 in water is 1.050 g/mL
If 9 g of Kr initially at 0.2 bar and 15 L is brought to 0.49 bar and 5L, what is the overall change in enthalpy of this process? Assume that Kr is an ideal gas.
Adenine is a purine base that is a component of several important molecules, including adenosine triphosphate (ATP), flavin adenine dinucleotide (FAD), DNA, and RNA. Draw adenine.
The current population of earth is about 6.5 billion people .Each person on average exhales about 1 kg of CO2 per day. How does this compare with current fossil fuel emission? This amount is not included in inventories of CO2 emissions. Why?
what is the broglie wavelength of an electron moving at one-tenth the speed of light. mass of the electron = 9.109* 10^-28
A concentrated nitric acid solution has a density of 1.13 g/mL and is 4.95 M. Calculate the % HNO3 by mass in the solution
13When heated in a flame, sodium atoms emit light with a frequency of 5.09 × 1014 s-1. What is the wavelength of this radiation in nm? [Data: c = 2.998 x 108 m/s ]
Explain what is meant by the terms respiratory pump and skeletal muscle pump. Why are these important to the cardiovascular system?
Acetylene gas (C2H2) burns with oxygen in an oxyacetylene torch to produce carbon dioxide, water vapor, as well as the great heat needed for welding metals. The heat of combustion of acetylene
Problem- When lead(II) nitrate is added to an aqueous solution of sodium iodide, a precipitation reaction occurs that removes the iodide ion from solution.
(a) If the chasm is 4.80 meters wide, how long does she take to cover this distance?
Problem- A hydrocarbon is a compound that contains mostly carbon and hydrogen. Calculate the percent composition (by mass) of the following hydrocarbon: C 6 H 14.
Question- How long will it take to produce 78.0 g of Al metal by the reduction of Al3+ ions in an electrolytic cell with a current of 2.00 amperes? ( Al: 26.98 g/mol)
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