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Chemistry, 22.06.2019 15:30
Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium
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Chemistry, 22.06.2019 21:30
An atomic nucleus is composed ofa)protons.b)protons and neutrons.c)protons and electrons.d)protons, neutrons, and electrons.
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Chemistry, 22.06.2019 23:00
Condensation happens when water vapor cools. true or false? ?
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Chemistry, 23.06.2019 03:30
Ahelium balloon contains 16.9 l of helium at stp. how many atoms of helium are in the balloon
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Asap 15)given: sio2 + 4hf → sif4 + 2h2o in this chemical reaction, how many grams of hf are needed...
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