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Suppose you are trying to determine the melting point of a compound, and then the following happens.
A) The compound turn from white to brown before melting
B) The compound slowly disappear from the capillary tube before melting.
Describe what happen in each case. How would you either report or correct it?
Calculate the potential of the cell. Indicate whether the reaction will proceed spontaneously in the direction considered (oxidation on the left, reduction on the right) or an external voltage source is needed to force this reaction to occur
If you had a high-energy xenon particle beam and wanted to make gold, what element would you bombard
How many liters of gas could be generated at STP from the reaction of dilute with 15.55 of an ore that is 29.7 iron(II) sulfide by mass?
the density of aluminum is 2.70 g/cm3 and the density of chronium is 7.19 g/cm3. if equal masses of aluminum and chronium are trasnferred in equal volumes of water in separate graduate cylinders, which graduated cylinder would have the greatest vo..
when silver nitrate reacts with zinc chloride silver chloride and zinc nitrate are formed. if you react 2.22 g of
What volume of O2 is needed to react completely with 20.9L of H2 to give H2O if all gases are measured at 25 degrees C and 1atm? The Balanced equation is: 2H2+O2 ----> 2H2O
If you collect hydrogen over water at 767 torr total pressure and 22.3 degrees celcius what is the partial pressure of the hydrogen
When 0.052 mol of aluminum sulfate are dis- solved in enough water to make 179 milliliters of solution, what is the molar concentration of aluminum ions?
How much heat do you need to raise the temperature of 150 g of gasoline from 30oC to 15oC?
Benzoic acid is a weak acid that has antimicrobial properties. Its sodium salt, sodium benzoate, is a preservative found in foods, medications, and personal hygiene products. Benzoic acid dissociates in water:
Assuming a 70.% yield in the overall reaction, what mass of limestone is required to remove all the sulfur dioxide formed by the combustion of 9.9 *10^4 kg of coal that is 0.33 mass % sulfur?
In designing a sulfuric plant, is it necessary to provide for heating or cooling of the reaction mixture. I don't understand the concept of enthalpy and how it applies to this question.
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