Consider the reaction cacn2 + 3 h2o → caco3 + 2 nh3 . how much nh3 is produced if 187 g of caco3 are produced? 1. 2.13 mol 2. 63.6 mol 3. 3.74 mol 4. 36.1 mol 5. 1.06 mol 6. 72.3 mol

Equation is as follow,
   
                               CaCN₂ + 3 H₂O   →   CaCO₂ + 2 NH₃

According to this equation, 
When,
100 g CaCO₃ (1 mole) is produced when  =  34 g NH₃ (2 moles) is produced
So,
187 g CaCO₃ will be produced then  =  X g of NH₃ will produce

Solving for X,
                                 X  =  (187 g × 34 g) ÷ 100 g

                                 X  =  63.58 g of NH₃ will be produced

Result:
          Option-2 is correct answer.

It's not the same dearthe first one is in grams per mole while the other is not