Balance the skeletal equation for the synthesis of urea. (Enter 0 for any empty boxes. Use the lowest possible coefficients.)

Question

_NH3 + _CO2 �¨ _CO(NH2)2 + _H2O

in the _ goes a number

Answer 1

I fail to see the difficulty in this.
2NH3 + CO2 ==> CO(NH2)2 + H2O