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How many moles of oxygen can be obtained by the decomposition of 10.0 mol of reactant in the reaction 2KClO3 --> 2KCl + 3O2
Perform the following mathematical operations, and express each result to the correct number of significant figures. 0.19*6.022*10^23
A gaseous compound containing hydrogen and carbon is decomposed and found to contain 85.63% C and 14.37 H by mass. The mass of 258 mL of the gas, measured at STP is 0.646 g. What is the molecular formula of the compound?
The numerical value of Kc depends on the form of the balanced equation. D) When quoting Kc it is customary to omit units.
calculate the heat transferred, Q when 51.0 ml of 2M NaOH solution and 50.0 ml of 2M HCl are mixed. Assume the final volume of the reaction mixture is 101.0 ml, its density is 104 g mL-1, and its heat capacity is 3.89 J g-1 deg-1
The contents of the closed boxes in each of the depictions below represents a system, and the arrows show the changes to the system during some process. Which of these processes is endothermic? 1.The first diagram has a box with 2 arrows heat(q) a..
a balloon filled with helium gas has a volume of 762 ml at a pressure of 1atm. the balloon is released and reaches
In the following conditions calculate the moles of hydrogen and the pressure in each flask where the volume is negligible. Each flask is originally 275K with .455 mols of hydrogen gas and .7atm of pressure. Then one flask is heated to 500K while t..
dilute to mark with water and mix. (You will need the extra volume of this most concentrated solution for further studies.) Record your actual standard concentrations accounting for the dilution as Cstd1, Cstd2, Cstd3, and Cstd4, respectively.
What minimum concentartion of Na_{2}SO_{4} will trigger the precipitation oftthe cation that precipitates first? Barium sulfate Ksp = 1.07 x 10^{-10} and calcium sulfate Ksp = 7.1 x 10^{-5}
Mercury is a 6th row and Zinc is a 4th row transition metal. if ionization energy depends upon effective nuclear charge and the distance of electrons from the nucleus, why do you think it takes more energy to ionize Mercury than Zinc
The temperature of a 15g sample of lead metal increases from 22oC to 37oC upon the addition of 29.0 J of heat. The specific heat capactiy of the lead is jg*K
A 50 mL soln. of Mg(NO3)2 is mixed with a 50 mL solution of NaOH. The resulting precipitate, Mg(OH)2, that forms is 2.97g. Determine the concentration of solution of Mg(NO3)2
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