A gas at STP has a volume and mass of 20,504 mL and 58.61 g, respectively. What is the molar mass of this gas

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

Compare and contrast physical changes with chemical changes.

Which element would mostly likely have an electron affinity measuring closest to zero