Question

Caffeine has molecular formula c8h10n4o2 find number of molecules in one gram of caffiene

Answer 1

Answer:

3*10^21 molecules approximately

Explanation:

using mole concept

given mass. no of moles

--------------- =

gram molcular mass

no of molecules= no of moles * avagadro constant

gram molecular mass of caffeine =194amu

no of moles= 1/194=0.005

nof molecules=0.005*6.022*10^23 =3*10^21 molecules