Gravity pulls gas and dust together. A protostar forms as mass increases.
Solubility is the ability of a solid, liquid, or gaseous chemical substance (referred to as the solute) to dissolve in solvent (usually a liquid) and form a solution. The solubility of a substance fundamentally depends on the solvent used, as well as temperature and pressure.
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I think the second space is chemical bonds
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C. A hydrocarbon molecule containing six carbon atoms and only
single bonds
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In oxidation reduction reactions, one species gets reduced by taking on electron(s) and another species gets oxidized by losing electrons. They also flow by a wire
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