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A solution of calcium nitrate, Ca(NO3)2, reacts with a solution of ammonium fluoride, NH4F, to form solid calcium fluoride, CaF2, and ammonium nitrate, NH4NO3(aq). When 45.00 mL of 4.8724 x 10-1 M Ca(NO3)2 solution was added to 60.00 mL of 9.9981 x 10-1 M NH4F solution, 1.524 g of CaF2 was isolated. Calculate the number of moles of Ca(NO3)2 originally present
Assume air in tank is mixed and that air is an ideal diatomic gas. For a heated tank what heat rate must be applied to keep the tank air temperature constant? For a perfectly insulated tank, what is the tank air temperature after 100 seconds? The ..
You must use realistic concentrations for full credit. If you cannot produce a cell with a 9V potential provide the calculations and cell that gives you a value closest to the 9 V value.
According to the following reaction, how many moles of zinc hydroxide will be formed upon the complete reaction of 0.292 moles zinc oxide with excess water
A certain reaction releases 10.1 kJ at constant volume and at constant pressure releases 8.4 kJ. What is the (delta)U for the reaction?
Explain what is the pH of the solution when 18.30 mL of 0.137 M trisodium hemimellitalate (trisodium benzene 1, 2, 3, tricarobxylate) is mixed with 25.00 mL of 0.274 M HNO3 (to two d.p.)
A 6280 g solution of chloroform and (CH3)2CO contains 1.22 kg of CHCl3. Calculate the mole fraction of chloroform in the solution.
Classify the set of solutions based on the movement of solvent from the first solution listed to the second solution listed as osmosis or reverse osmosis.
What is the age of the wine in the glass on the left, and the glass on the right? b. What assumption(s) do you have to make in order to compare their tritium counts?
when 79.272 cg of nitrogen gas is reacted with 79.272 cg of hydrogen gas how many grams of ammonia are
A voltaic cell consists of an Au/Au3+ electrode (E° = 1.50 V) and a Cu/Cu2+ electrode (E° = 0.34 V). Calculate [Au3+] if [Cu2+] = 1.20 M and Ecell = 1.13 V at 25°C.
C2H5OH (liq) +O2(g) ------ CO2 (g) + H2O(g) reaction at 398 kevin and show the thermo-chemical cycle that accounts for each step necessary to calculate ΔH0 at a temperature removed from 298 kelvin.
Suppose that you are going to collect H2 gas produced from the reaction of an acid with a metal such as zinc. This reaction gives off heat, so the tem perature of the solution will increase as the reaction proceeds.
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