Someone please answer I’m literally crying this is due today at midnight please I’m begging you to answer

What are the percent by mass of copper in penny lab

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

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?