Plzz try to answerr as much as u cann from this worksheet. whoever has the most/best answers gets brainliest

1) 2c2h6 + 7o2
2) 4co2 + 6h2o
3)carbon, oxygen, hydrogen
4) oxygen gas, water, carbon dioxide, ethane
5)12 hydrogens and 6 oxygens
6)tells you there are 6 water molecules
7)i think no but not sure
table: 1st blank 0.5 g/cm^3 2nd blank 5 g/cm^3 3rd blank 17/4 g/cm^3 or 4.25 g/cm^3
8) i think it’s physical
9) chemical but not sure
10)definitely chemical
11) not sure
12)element
13) compound
14) not sure but possible a mixture
15) idk
16) exothermic/exergonic (if this reaction was spontaneous then its exergonic)

What is the question

Answer) by studying proton collisions hope this : )