Question

Which has max no of molecules ? ( 7g N2 / 2g H2 / 16gNO2 / 16g O2 )

Answer 1

Hey there! Your answer is 2g H2.
No. Of molecules =given mass/molar mass *avogadro no.
So no. Of molecules in 2g of h2=2/2 * avogadro. No. =6.022* 10^23.
Other options will have less no. Of molecules since they will be divided by some other fractions.
Hope that helps you :-)