Question

HOW MANY MOLECULES OF ASPIRIN (molar mass=180 amu)ARE PRESENT IN 50MG TABLET?​

Answer 1

50mg = 50 x 10^ -3g

now no of moles = 50mg/180g

nd now no of molecules=.6022 x 10 23 50 x 10^-3 /180g

= 50 x 10^20/3

= 16.67 x 10 ^20

Answer 2

molar mass:180g

mass:50mg=0.05g

moles:mass/molar mass

0.05/180g

0.00027bar is the answer

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