(i) Calculate the total number of electron present in one mole of method
(ii) Find (a ) the total number and ( b) the total that mass of neutron = 1.675 `xx 10^(27)` kg
(iii) Find (a ) the total number and ( b) the total mass of protons in 34 of `NH_(3)` at STP
Will the answer change if the temperature and pressure are changed ?

Explanation

(i) Electron of 1 molecule of `CH_(4)` methane = (one of C+ four of H ) = 6 + 4 =10 electron
6.022 `xx 10^(23) = (6.022 xx 10^(23) xx 10)/( 1)`
`=6.022 xx 10^(24) ` electron `//` mole
(ii) (a ) weight 1 mole of `.^(14)C` =14 gm
number of atom carbon = 14
`=(7xx 10^(4))/(14) xx 6.022 xx 10^(23)`
(iii) Molecular mass of `NH_(3) - 14 _ 3`
34 mg = 34 `xx 10^(-3) gm NH_(3)`