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Problem- A mixture of helium and neon gases at 225 K contains three times the number of helium atoms as neon atoms. The concentration (n/V) of the mixture is found to be 0.150 mol/L. Assuming ideal behavior, what is the partial pressure of helium?
If possible just a brief explanation how you got the answer?
what is the concentration ratio of the free (and potentially toxic) Pb2+ (aq) in the blood to the much less toxic Pb 2+ - EDTA complex?
experiment to determine delta H of solution, would you expect to get a larger, smaller or identical temperature change? why?
2Al + 6HBr = 2AlBr3 + 3H2 If .427 g of Al reacts calculate the amount of hydrogen produced
Compound A c6 h 14 gives three different monochlorides on photochemical chlorination. one of these monochlorides is inert to E2 elimination. the other two monochlorides yiels the same alkene B C6 h12 on being heated with potassium ter-butoxide in ..
Calculate the molarity of a solution made by dissolving 5.00 g of glucose (C6H12O6) in sufficient water to form exactly 100 mL of solution.
By what factor does the reaction rate increase at 25oC when the catalyst is used. Assume that the Arrhenius pre-exponential factor, A, is the same for the catalyzed and uncatalyzed reactions.
When no single electronic formula can be drawn for a stable molecule so as to maintain the octet rule and still fit the observed properties, the situation is best described in terms of
Use a spreadsheet to calculate the composition of dry air at 5400K and 1 bar. Take the initial composition as .78 mol N2, .21 mol O2 and .01 mol Ar. Neglect the ionization of NO.
Calculate the empirical formula of the compound (CxHyOz). B) If the 4.00g sample corresponds to 0.0666 moles of a compound, what is the molecular formula of the unknown molecule (CxHyOz)
If the total volume of the jewelry is the sum of the volumes of the gold and silver that it contains, calculate the percentage of gold (by mass) in the jewelry
A technologist treats the sample with 100 mL of 0.1550M Na2C2O4. Calculate [Ca^2+] after the treatment. (CaC2O4*H2O Ksp = 2.30*10^-9)
Determine the ksp magnesium hydroxide where the solubility of Mg(OH)2 is 1.4x 10-4
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