Question

What mass of n2 gas will contain same number of molecules as 1.8 gram of water

Answer 1

No.of moles×avogadronumber (Na)=number of molecules. Water given mass is 1.8g molar mass18g.so number of moles givenmass ÷molarmass =0.1.so number of molecules 0.1Na . For nitrogen 28g gives Na molecules 2.8g gives 0. 1Na molecules