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The Brainliest Answer!
2015-04-16T11:55:23+05:30
for this reaction is :-
CaC₂ + 2H₂O → Ca(OH)₂ + C₂H₂
two mole of water is react with 1 mole calcium carbide to form                                 1 mole of acetylene.
for 10 gm 
calcium carbide mole of acetylene is 
  =10 g CaC₂       = 0.1560 mol C₂H₂
    64.10 g CaC₂ [ M.W]   

1 mole of C₂H₂ contain 6.022×10²³[Avogadro's number] molecules
for 0.156 mol of C₂H₂ contain  = 0.156 x 6.022×10²³
                                            = 0.939 x 10²³
                                           ≈  9.4 x 10²² 
2 5 2