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A compound contains only carbon, hydrogen, nitrogen and oxygen. Combustion of 0.314 g of the compound produced 0.426 g CO2, and 0.0620 g H2O. In another experiment it is found that 0.103 g of the compound produces 0.0460 g of NH3. What is the empirical formula of the compound?
to 333 milliliters of a 0.120 molar pbno32 solution 0.667 milliliteres of 0.435 molar kio3 is added. calculate the
At the endpoint of a titration of a weak acid HA (nicotinic acid) with NaOH (100 mL each, 0.100 M), the pH is 8.78. What is the apparent Ka of the acid
In which solution (acidic, basic, neutral water, or doesn't matter) is copper(II) chloride most soluble
How many independent linear combinations are possible for four 1s orbitals? (b) Draw pictures of the linear combinations of H1s orbitals for a hypothetical linear H4 molecule.
During the course of an experiment, a 0.300 M NaCl solution with an initial volume of 25.0 ml is diluted to a total final volume of 26.0 ml. What is the concentration of NaCl in the final solution?
A rigid Vessel containint initially 100kg of water is going to be heated from 25 degree C to 80 degree C using steam as a medium. the steam will be added slowly such that all the steam condenses.
an 18-karat gold necklace is 75 gold by mass 16 silver and 9.0 copper. how many grams of copper are in the necklace? if
General Chemistry The pH of a solution of NH3 and NH4Br is 8.90. What is the molarity of NH4Br if the molarity if NH3 is 0.016M
at a particular temperature k2.0x10-6 moll for the following reaction 2co2 g at equilibrium with 2cog o2 g if 2.1 mol
A 25 g sample of water revealed a mass percent for lead of 2.64%. Calculate the number of grams in lead
The following reaction is investigated (assume an Ideal gas mixture)2N2O(g) + N2H4(g) 3N2(g) + 2H2O(g), Initially there are 0.10 mol of N2O and 0.25 mol of N2H4 in a 10.0-l container, If there are 0.50 mol of N20 at equalibrium
Use the Van Der Waals equation to calculate the pressures of the three real gases. Compare the plots and explain the origins of any differences you find.
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