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Problem- Helium gas, 3.0 x 10 -4 g, is dissolved in 200 g of water. Express this concentration in parts per million.
Explain the each and every step in detail for help
A current of 3.78 A is pass through a Fe(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 5.80 g of iron
hydrogen gas can be produced by reacting aluminum with sulfuric acid. how many moles of sulfuric acid are needed to
The density of air at ordinary atmospheric pressure and 25 degrees C is 1.19 g/L. What is the mass in kilograms of the air in a room that measures 8.2 m x 13.5 m x 2.75 m
The U.S. Navy has a system for communicating with submerged submarines. The system uses radio waves with a frequency of 76 s-1. What is the wavelength of this radiation in meters?
calorimeter in which the temprature of the bomb and water increase from 19.5 to 22.83 C? the bomb has a heat capicity of 650 J/K; the caloriemeter contains 320g of water.
How many half lives will it take the c4h6 to decrease to 3.1% of its original concentration? the relationship of At/ A0= 0.50
For 0.51 M HCN (Ka=6.2 x 10-10), mark the majorand minor species found in the solution. H+ HCN CN- H2O OH- Now calculate the pH of 0.51 M HCN solution. (Ka=6.2 x 10^-10)
element z has two isotopes: one has mass number of 19.0 amu is 55.0% abundant,and the isotope with mass number 21.0 amu is 45.0% abundant. what is the average atomic mass for element Z?
the dipole moment of CD^3F is 1.858 D, which is more electronegative, hydrogen or deuterium?
Krypton crystallizes as a fcc (face centered cubic unit cell) having an edge length of 559 pm. What is the density of solid Krypton?
Consider 20.0 moles of CO2 in a 1.0 liter container at 300.0 K. What is the pressure predicted by the van der Waals equation.
Which of the isomers of octane has only two peaks in its 13C NMR? Draw the structure of the alkane. 2. Draw the structure of the C4H9Cl isomer given the following proton NMR data:
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