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A sample of propane,C3H8, contains 11.7 moles of carbon atoms. How many total moles of atoms does the sample contain?
Analysis with an elaborate instrument indicates that substance A contains two elements. Substance B and substance C react to give a new substance D.
The activation energy of a certain reaction is 32.3kJ/mol . At 20 degrees C, the rate constant is 0.0130s^-1. At what temperature would this reaction go twice as fast? The equation that is given is ln(K2/K1)=Ea/R((1/T1)-(1/T2)) a. what is R in thi..
How will the melting point of your semicarbazone derivative be affected if the derivative is not dry enough
Gold sells for $1120/oz. One ounce is equal to 28.35g. The molar mass of gold is 196.97g/mol. 1 moldovian franc contains 0.567g of gold. If 1 franc = $1.42, how many atoms of gold are presents in 0.010 moldovian francs?
In the television series Star Trek, the transporter beam is a device used to "beam down" people from the Starship Enterprise to another location
Why should you store the crucible plus sample in a desiccator after heating and before weighing? why should you heat the sample to constant mass?
5.00 moles of CO2(g) is in a rigid container with a volume of 3.00 liters. The initial temperature is 291 K and the initial pressure is 33.3 bar. Then 4.95 kJ of energy is added to the gas as heat; this raises the temperature to 325 K and raises t..
Consider 0.10 M solutions of the following substances. Rank the solutions in order of increasing pH where 1 is the solution with the lowest pH and 7 is the solution with the highest pH.
sample melts before you were ready to read the temperature. Should you cool the capillary and start again or prepare a fresh sample? Explain.
Consider the two equilibria and their equilibrium constants: (1) 2NO2(g) ↔ N2O4(g) KC1 (2) ½N2O4(g) ↔ NO2(g) KC2
In alkene mechanisms, is the formation of an enantiomeric pair of sterioisomers possible for the final product. and Why
lead(II) sulfide was once used in glazing earthenware. It will react with hydrogen peroxide to form lead (ii) sulfate and water. How many grams of hydrogen peroxide are needed to react completely with 265g of lead(ii) sulfide?
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