please help me answer this experts.please explain how to get  b part of question

please help me answer this experts.please explain how to get  b part of question (Answer any 4 questions from 6 to 10. Each question carries 2 score.) 6. The balanced chemical equation for the formation of ammonia gas by the reaction between nitrogen gas and hydrogen gas is given. N2+3H2 -i 2NH3 (a) Write the ratio between the number of moles of reactants and products in the correct order. (b) How many moles of ammonia are formed when 6 moles of N2 react with 6 moles of