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If water had not been added to your initial product, what error in the percentage magnesium determined would have resulted(that is if the part of the product has been magnesium nitride)? Explain.
2A yields 3B; ?H -50 kJ. If 9 moles of B are formed during this reaction, what was the enthalpy change
Twenty-five pounds of gas consisting of 40% CO, and 30% H2 are placed in a cylinder 200 ft^3 in volume. What is the a) average molecular weight of the gas?
Consider a process carried out on 1.00 mol of a monatomic ideal gas by the following pathway from state A to state B
Volume in liters of 0.625 M manganese(II) sulfate that contains 92.4 g of solute. (Do not enter the units of your answer). Calculate to 2 decimal places and do not include units.
What is the gauge pressure at a depth of 4.50 mi below the surface of the sea if thewater temperature averages 60°F? Give your answer in lb (force) per sq. in. The sp grof sea water at 60°F/60°F is 1.042 and is assumed to be independent of pressur..
The cell potential of the following electrochemical cell depends on the gold concentration in the cathode half-cell: Pt(s) | H2(g,1atm) | H+(aq,1.0M) | Au3+(aq,?M)|Au(s).
Calculate the weight of helium in pounds to fill a ballon whose capacity is 1.0 X10^6 ft^3 at 1 atm pressure and 27 C.
titrate the first HA solution with 87.4 mL of 0.0906 M NaOH and the mixture of HA and HB in the second flask with 94.0 mL of the NaOH solution. Calculate the molarity of the HA and HB solutions.
Given that the freezing point of pure water is 0 C and that the freezing point depression constant for water is 1.853 (C kg)/mol calculate the molar mass (g/mol) of this compound
One compound of mercury with a formula mass of 519 g mol-1 contains 77.26%Hg, 9.25%C, and 1.17%H (with the balance beingO). Calculate the empirical and molecular formulas.
The answer to formula and calculation, survey of physical chemistry, State all of the assumptions (e.g. ideal gas etc). (previous reaction is 2H??2(g) + O2(g) ----> 2H2O(g))
Calculate the pH for each of the following cases in the titration of 25.0 mL of 0.230 M pyridine, C5H5N(aq) with 0.230 M HBr(aq):
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