Question

no. of moles in 9 gm of H2O2

Answer 1

moles=given mass /molecular mass
moles=9/36
moles=.25

Answer 2

Mass of H2O2=34
NO. OF MOLES in the H2O2=MASS OF H2O2 IN GRAMS÷MOIECUIAR MASS OF H2O2=9÷34=0.26471 moles
In 9 gram of H2O2=0.26471 MOLES