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If 0.66 mole of substance has a mass of 99 g, what is the molecular mass of the substance.
A particular first-order reaction has a rate constant of 1.35 x10^2 s^-1 at 25 degrees Celsius. What is the magnitude of k at 75.0 degress Celsius if Ea= 85.6 kJ/mol
mercury has a density of 13.6 g per ml. a barometer holding 9.50ml of mercury has broken. the cost of mercury disposal
calculate the standard emf of a cell that uses the mgmg2 and cucu2 half-cell reactions at 25 degrees celsius. write the
3M hydrochloric acid and 3cm strip of magnesium ribbon. 3cm strip of magnesium ribbon and 2mL of 0.10 M silver nitrate
what is the voltage after the addition of the following volume of NaI solution? The reduction potential for the saturated calomel electrode is E = 0.241 V. The standard reduction potential for the reaction is E0 = 0.79993 V.
The specific rate constant at 293 K is found to be 2.35 x 10^-4 s^-1 and at 303 K the specific rate constant is found to be 9.15 x 10^-4 s^-1. Calculate the frequency factor for the reaction at 303 K.
How many grams of a stock solution that is 87.5 percent H2SO4 by mass would be needed to make 275 grams of a 55.0 percent by mass solution.
Assume that the wet limestone process requires 1 metric ton of CaCO3 to remove 90% of the sulfer from 4 metric tons of coel containing 2% S. Assume that the sulfur product is CaSO4. Calculate the percentage of the limestone converted to calcium su..
The pressure of the vapor of the unknown liquid in this experiment was taken to be equal to the atmospheric pressure in the laboratory. why?
If 29.7 mL of 0.0205 M KOH us required to completely neutralize 25.0 mL of a HC2H30 solution. What is the molarity of the acetic acid solution
Two 20.0g ice cubes at -12.0^degree C are placed into 235g of water at 25.0^degree C. Assuming no energy is transferred to or from the surroundings, calculate the final temperature of the water after all the ice melts
When a solute reaches its solubility limit in a solvent, the dissolution process completely stops. When a solute has large solubility in a solvent, the two compounds are miscible to each other.
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