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To determine the number of molecules present in air using the ideal gas law and Avogadro's number.
Assuming that air contains 78 percent N2, 21 percent O2, and 1 percent Ar, all by colume, how many molecules of each type of gas are present in 1.0 L of air at STP?
consider preparing an electrolytic cell with solid cu amp 0.40 m cuno32 solution in one half cell and solid ag amp 0.60
if i have 0.621 mole of potassium chlorate that decomposes by heat, what is the amount of the oxygen in moles?
Consider the following reaction: 2H2O + 2SO2 2H2 + 3O2 A reaction mixture initially contains 2.8M H2O and 2.6 M SO2.
Calculate the solubility product, Ksp, magnesium oxalate (MgC2O4) using appropriate standard reduction potentials from Appendix H
What is the final pH when 100 ml of 0.1 M HCl is added to 150 ml of 0.2 M dihydrogen phosphate
Calculate the difference in molar entropy (a) between ice and liquid water at 5.00 °C, and (b) between liquid water and its vapor at 90.0 °C and 1.00 atm. The differences in molar heat capacities on melting and on vaporization
The air in a laboratory was measured with a barometer to be 7.40 x 10^2 mm Hg. What is the laboratory air pressure in atm?
Calculate the mass of the solvent (CCl4) in kg. Use the molality calculated in question 2 and the solvent mass calculated in question 3 to determine the number of moles of solute present in this solution.
what would be a procedure to go by for the reaction of 2 methyl 2 octene with Hbr and what solvents could be used
A cube of lead (? = 11.3 x 103 kg/m3) is placed in a pool mercury (? = 13.6 x 103 kg/m3). The cube of lead is 3.60 x 102 cm on a side. Calculate the percentage of the cube that is above the pool of mercury.
If the TLC solvent is changed to 20:1 Hexanes:ethyl acetate, how should the Rf values be affected?
Compute the number of moles of Chlorine atoms in 3.01×10^24 formula units of magnesium chloride,MgCl2 .
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