Question

Calculate the no. of molecules present in 0.49 gm of sulphuric acid. [H=1,S=32, O=16].​

Answer 1

ur answer is in the above pic

hope it helps

Answer 2

no. of molecules = ( given mass / molar mass ) × avogadro's number ...

given mass =0.49gm

molar mass of H2SO4 = 98

no. of moles of H2SO4 present = 0.49/98 = 1/200 = 0.005 moles

therefore number of molecules = 0.005 × 6.022 ×10^23 = 30.11×10^20 molecules.....

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