calculate the number of H atom in 3.206g of caffeine (C3H10N4O2)?
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Molar mass of caffeine = 194 g/mol
No. of moles of caffeine in 3.206 g = 0.0165 moles
0.0165 x 6.022 x 10²³ atoms = 0.09963 x 10²³ = 10²² atoms (approx)
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