Create something, or upgrade an existing invention that can solve a problem in nature or society

2h2s + 3o2 2so2 + 2h2o which option gives the correct mole ratios? h2s: so2 = 2: 2 and o2: h2o = 3: 2 h2s: so2 = 2: 3 and o2: h2o = 3: 2 h2s: so2 = 4: 4 and o2: h2o = 5: 4 h2s: so2 = 4: 6 and o2: h2o = 4: 4

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!