Question

calculate the number of molecules present in 392 gram of sulphuric acid

Answer 1

\[1 mole--->6.02*10^{23} molecules\]
\[4 mole-->x molecules\]
\[x=4*6.02*10^{23}/1\]
Number of Moles=Mass(g)/Molar Mass
Provide each elements atomic weigh
S:32 grams H:1 gram O:16
H2SO4 Molar Mass:(2*1)+(32*1)+(16*4)=98 grams
Plug in 392 as the mass and 98 as the molar mass
392/98= 4 moles of Sulfuric

Answer 2

\[molar mass of H2SO4 = 98.086 g/mol\]
\[392 g \times \frac{ 1 mole }{ 98.086 g}\times \frac{ 6.02\times 10^{23} }{ 1 mole}= 2.41\times 10^{^{24}} molecules\]