12gm of mg (atomic mass 24) when reacted completely with acid gives hydrogen gas.its volume in litres at stp would be

12gm of mg (atomic mass 24) when reacted completely with acid gives hy

1.	12gm of mg (atomic mass 24) when reacted completely with acid gives hydrogen gas.its volume in litres at stp would be
Answer» Hello Mate Mg + 2HCL----> MgCl2 + H2 Therefore, if there are 'n' moles of MAGNESIUM then on reaction with acid like HCl will GIVE 'n' moles of dihydrogen gas. No. of moles = Mass of substance/Molar mass of substance Therefore, No. of moles of 12 gm of Mg = 1/2 moles. Now, volume occupied by one mole of dihydrogen gas at STP = 22.4 litres Therefore, volume occupied by half mole of dihydrogen gas = 11.2 litres Hope it helps☺!