Question

Calculate the number of atoms in 56g of Nitrogen

Answer 1

moles in 56 gm of nitrogen=56/14=4
no of atoms = moles* Na
=4*6.023*10²³

Answer 2

given-

number of atoms in 56g of Nitrogen

solution-

1 mole of any  substance contains 6.022*10∧23

mass of nitrogen= 14*2=28g

∴ no. of moles in  b56 g= 56÷28 moles

                                              =2 moles

∴no. of molecules in 2 moles of nitrogen =6.022*10∧23 *2 molecules                                                          

                                                                    =12.044*10∧23 molecules

∴no.of atoms =12.044*10∧23 *2

                       24.088*10∧23 atoms

ans- the no of atoms in 56g of nitrogen=24.088*10∧23 atoms