This is really simple. Assuming all these reactions are stoichiometric, the ratios of moles if always given by:
[tex] \frac{n {}^{} }{x} = \frac{n}{y} [/tex]
The first n represents the number of moles of the first reactant.
The x represents the coefficient of the first reactant in the equation.
The second n represents the number of moles of the second reactant.
The y represents the coefficient of the second reactant.
For example, let's use the first equation:
[tex] \frac{n \: n {}^{2} }{1} = \frac{n \: h {}^{2} }{3} [/tex]
Using cross multiplication;
[tex]3n \: n {}^{2} = 1n \: h {}^{2} [/tex]
For each H² mole, we need 3 N² moles
Ratio of N² to H² is 3:1
Hope this given you an idea of how to continue the rest.
If you get stuck you can always comment so i can help you.
Make sure to tell me what you get as your answers so you get a good grade :)
