Q.
Five moles of electrons are present in----- grams of methane
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a
40 g
b
16 g
c
24 g
d
8 g
answer is D.
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Detailed Solution
Each carbon atom, C612 contains….6 protons, 6 electrons and 6 neutrons ;Each hydrogen atom, H11 contains….1 proton, 1 electron and zero neutrons ;Thus each molecule of CH4 contains…10 protons, 10 electrons and 6 neutrons ;Thus each mole (16 g) of CH4 contains…10 moles (10 NA) of protons, 10 moles (10 NA) of electrons and 6 moles (6 NA) of neutrons ;= 5×1610= 8 gm
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