The charge on one kg of electron is:
Correct answer: A. 1.7588 x 10^11 C
- A. 1.7588 x 10^11 C
- B. 1.65 x 10^19 C
- C. 9.1095 x 10^-31 C
- D. 7.9 x 10^25 C
Explanation
This answer should be learnt due to unavailability of calculator in exam. Working is shown below:-Charge of an electron: -1.602 x 10^-19 CMass of an electron: 9.11 x 10^-31 kgElectrons in 1kg: 1/(9.11 x 10^-31) = 1.10 x 10^30Charge of 1kg of electrons: (1.10 x 10^30)(-1.602 x 10^-19) = -1.76 x 10^11 C
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About Fundamental Concepts of Chemistry
Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
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