Give twoexamples in which nitrogen is added to air

Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h

Determine the reaction and balance the following equations urgent due in the morning

Can someone me with 6 to 10 plz this is for masteries test.