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There are two stable isotopes of copper. Their masses are 62.9296 amu and 64.9278 amu. If the average atomic mass of copper is 63.55, what is the natural abundance of the lighter isotope?
What is the pH of 50 mL of .122M sodium glycinate titrated with .100M HCL at second equivalence point
provide the newman projections across the c2-c3 bonds for the major conformers after drawing the zig-zag structures of
A 6.55 g sample of aniline (C6H5NH2) was combusted in a bomb calorimeter. If the temperature rose from 22.25 ? C to 55.15 ? C, use the information below to determine the heat capacity of the calorimeter in kJ ? C ?1.
calculate the mass of nitrogen dissolved at room temperature in an 77.0 home aquarium. assume a total pressure of 1.0
What is the ay4- when edta is at ph of 10.5. is there a special trick when the ph is higher the pka6 equilibrium
If a student starts with 615g of Co(NO3)2 and obtains a 57.3% yield of CoS, what mass of CoS is isolated? Co(NO3)2 +K2S ---> CoS + 2KNO3
ammonia gas is synthesized according to the balanced equation below.n2g 3 h2g -gt 2 nh3gif 2.50 l n2 react with 7.00 l
1. How to use Lewis electron-dot symbols to depict main-group atoms and ions
Methylene blue and diphenylbenzidine sulfonic acid are redox indicators that turn from colorless in the reduced state to blue (methylene blue) or violet (diphenylbenzidine sulfonic acid) in the oxidized state. Indicate whether each is a suitable i..
a solution is prepared by adding 40.3 g of Mg(NO3)2 to 127 g of water. Calculate the mole fraction and molality of magnesium nitrate in this solution
During a routine check of the fluoride content of Gotham City\'s water supply, the following results were obtained from replicate analyses of a single sample: 0.511 mg/L, 0.487 mg/L, 0.511 mg/L, 0.487 mg/L, and 0.519 mg/L Determine the mean and 90..
For the reaction NO2(g) + CO(g) => NO(g) + CO2(g) at temperatures below 500 K, the rate law is rate = k [NO2]2. Which mechanism is consistent with this information. Mechanism 1 NO2 + NO2 => NO3 + NO slow CO + NO3 => CO2 + NO2 fast Mechanism 2 NO2 ..
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