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Find out the mass of the copper that was removed from the penny. Presuming excess nitric acid, computing the grams of copper (II) nitrate that must have formed in the reaction
Original penny weight: 3.0712gAfter nitric acid bath: 2.1476gUse this reaction:Cu(s) + 4HNO3(aq) -> Cu(NO3)2(aq) + 2H20(l) + 2NO2(l)
an aqueous solution is 36 by mass silver nitrate agno3 and has a density of 1.41 gml. what is the molality of silver
Calculate the change in Gibbs free energy for each of the following sets of ΔH ° rxn , ΔS ° rxn , and T .
When white phosphorous (P4) is heated above 1100 K, the following equilibrium is observed in the gas phase P4 ? 2P2 b. The equilibrium constant has been measured as a function of temperature for this reaction
Calculate the number of molecules of AsCl3 that would be in 1 mL of Solution C at this concentration. Look at your answer. This is the average number per mL. But what is the most likely number (ie integer) of molecules of AsCl3 in 1 mL?
Organic hydrogenation reactions, in which H2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. In the simplest case, ethene (C2H4) and H2 form ethane (C2H6).
Write the simplest balanced equations, and find the actual relative masses of the elements. Explain your reasoning.
In a titration, 25.18 mL of monoprotic weak base HA is neutralized with 25.18 mL of 0.502 M NaOH. Calculate the ratio of [A-] to [HA] after 12.59 mL of 0.502 M NaOH has been added to the initil amount of HA.
The air we breathe is approximetly 20% oxygen. the reaction for the complete combustion of acetylene is 2C2H2 + 5O2 ------> 4CO2+ 2H2o
What is the final temperature of spoon + coffee? (Assume that the heat capacity of the spoon is the same as that of pure iron and that the heat capacity of the coffee is the same as that of pure water.)
what is the change of enthalpy in condensing 15.0 g of water at 100 degrees C at constant pressure.
You find a reagent bottle that is labeled with "vanadium (III) nitrate hydrate" and it contains a chalky looking powder. Do you believe the label? Why or why not?
We are given an unknown antacid pill and through the procedure in this lab we determine its cost effectiveness to be 5.0x10-1 mole of acid/$. Can we also determine the number of moles of base in the pill
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