3.88 x 10²⁰ molecules in a cup of coffee.
<h3>Equation :</h3>
moles = mass /molar mass
moles = 125 x 10⁻³ / C8H10N4O2
moles =125 x 10⁻³ / (12 x 8) + (10 x 1) + (14 x 4) + (16 x 2)
moles = 125 x 10⁻³ / 194
moles = 6.44 x 10⁻⁴ moles
molecules = moles x Avogadro's number
molecules = 6.44 x 10⁻⁴ x 6.022 x 10 x 23
molecules = 3.8 x 10²⁰ molecules
<h3>What is caffeine common name?</h3>
Trimethylxanthine is more commonly referred to as caffeine (C8H10N4O2) (systematic name is 1,3,7-trimethylxanthine or 3,7-dihydro-1,3,7-trimethyl-1H-purine-2,6-dione). Coffeine, theine, mateine, guaranine, or methyltheobromine are additional names for the substance.
To know more about substance :
brainly.com/question/16144425
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