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The radius of electron in the first excited state of hydrogen atom is: (1) a 0 (2) 4a 0 (3) 2a 0 (4) 8a o
Beginning in the early nineteenth century, scientists developed models to explain the structure of the atom. As more information was discovered about the nature of the subatomic pa
Q. Show properties of the Borax? Salts of boric acids are known as borates. As said earlier, hydrated borates occur naturally, e.g., borax, Na 2 B 6 0 11 . 5H 2 0, kernite, Na
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Q. Describe Dalton Law of Partial Pressure? Ans. According to the Kinetic Molecular Theory, the pressure-volume- temperature relationship is the same for all gases. This
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Write the chemical equation for the entire combustion of heptane, C 7 H 16 . The heat of combustion for heptane is 4817 kJ/mol. How much heat could be released if 250 kg of hept
RL, a 28-year old first time father, was watching his 4-month old baby for the weekend while his wife was away at a sales meeting. Things were going well. He had run out of breast-
Q. Explain the use Radioactive Nuclides? Ans. Radioactive elements are easily found because they emit radiation. They can be used as tracers to show what is happening in
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