Question

Calculate the number of particles in 0.2g of water molecules

Answer 1

Molar mass of H2O2 is 2g

2g of H2O2  Contains 6.023\times10^{23} molecules

200mg = 0.2 g

0.2 g of  H2O2  Contains --------?

=0.2×6.023×10232=6.023×1021=0.2×6.023×10232=6.023×1021 molecules

The number of molecules present in 0.2 g of  H2is2.737×1021

Answer 2

Molar mass of H2O2 is 2g

2g of H2O2  Contains 6.023\times10^{23} molecules

200mg = 0.2 g

0.2 g of  H2O2  Contains --------?

=0.2×6.023×10232=6.023×1021=0.2×6.023×10232=6.023×1021 molecules

The number of molecules present in 0.2 g of  H2is2.737×1021