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Rhenium has 2 naturally taking place isotopes- Re-185 with a natural abundance of 37.40 percent and Re-187 with a natural abundance of 62.60 percent. The sum of the masses of the two isotopes is 371.9087 amu. Determine the masses of the individual isotopes?
assuming no heat loss, and that the specific heat (capacity) of water is 4.184 J/g*K, what is the heat capacity of the copper in J/K?
How would the following changes affect the rate of the reaction with 1-bromobutane with NaI: doubling the concentration of 1-bromobutane. Doubling the concentration of NaI
Balance each of the half reactions in acidic solution a)Cu(s)>Cu^2+(aq) b)SO4^2-(aq)>SO3^2-(aq) c)BrO3^-(aq)>Br^-(aq) d)IO3^-(aq)>I2(s)
A calorimeter with a heat capacity of 4.61 kJ/K contains 18,050 g of freon-12. Benzoic acid is combusted in the calorimeter and liberates 26,400 J of heat energy causing the temperature to rise 3°C. Calculate the specific heat of freon-12 in J/g°C..
A buffer is prepared by mixing 295 mL of 0.210 M HCl with 584 mL of 0.559 M ammonia (NH3). Given that the Kb of NH3 is 1.8 x 10-5, calculate the pH of the solution.
If 2.30 grams of rust were allowed to react with aluminum metal, aluminum oxide would be formed. what mass of aluminum oxide would be generated from this reaction
How much heat energy is needed to raise the temperature of 2.01 Kg of this oil from 23 C to 191 C?
limestone is decomposed by heating to quicklime and carbon dioxide. Calculate how many grams of quickline can be produced from 1.0kg of limestone
What is the solubility of MnS, in grams per liter, in a buffer solution that is 0.115M HC2H3O2 - 0.500M NaC2H3O2 ? For MnS, Kspa=3x10^7
Each polypeptide in the alpha keratin dimer has 3.5 residues per turn, resulting in the slight winding, or twist, around the other polypeptide
A 25.43 g sample of a substance is initially at 25.9 °C. After absorbing 1137 J of heat, the temperature of the substance is 120.5 °C. What is the specific heat (c) of the substance?
Which of the following molecules would you expect to be the most strongly attracted to a Cl- ion. H-F
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