What is the ratio of water,methane and ammonia in the Miller-Urey Experiment? Share with your friends Share 0 Summaiyya Khan answered this The ratio of ammonia, methane and hydrogen in miller-urey experiment is 2:2:1 -17 View Full Answer Dikpal Kc answered this lets remember a trick::NH3 has odd number of hydrogen so take it 1H20 and CH4 have even number of hydrogen. take it 2.so the Ratio of : NH3:CH4:H20 = 1:2:2 2