Hello! I need a bit of help and Im kinda in a bit of a hurry so please help! Thank you :D

Chemistry

2 answers:

Scorpion4ik [409]3 years ago

8 0

The first one is substance 3
The second one is Oxygen, Helium, and carbon dioxide
The third one is the oil floats on top of the water

aalyn [17]3 years ago

8 0

Answer:

so for the first one it is the third one the second one it is carbon dioxide and for the third one,. Gasoline is an oil product. It floats and doesn't mix with water.

Explanation:

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<h3>How to calculate HDI:</h3>

The hydrogen deficiency index is used to measure the number of degree of unsaturation of an organic compound.

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