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2015-09-29T19:44:49+08:00

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Because of the structure or the size of the molecules of the compounds. When molecules are small, they interact less. (Smaller molecules are usually gases)

 When the molecules are bigger, they interact more. That's why bigger molecules tend to settle inliquid state.
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2015-09-30T16:37:44+08:00

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Hydrocarbons are organic compounds consisting primarily of carbon and hydrogen atoms. Some hydrocarbons are gases because the molecules are small structure and there interaction less among each other, while some hydrocarbons are liquids because the molecules are big structures and there interaction more with each other and they tend to settle in liquid state.
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