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What is the typical percentage (by mass of elements other than hydrogen and helium in stars that are forming right now in the vicinity of the sun?
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What is the percentage of hydrogen in nitrogen trihydride
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Chemistry, 22.06.2019 22:00
Does the number of ions in solution increase, decrease, or remain constant? it continuously decreases. it continuously increases. it decreases at first, then increases. it increases at first, then decreases.
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Who examines and coordinates the cleanup of polluted sites?
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Chemistry, 23.06.2019 01:30
Ariver current has a velocity of 5km/h relative to the shore, and a boat moves in the same direction as the current at 5 km/h relative to the river. how can the velocity of the boat relative to the shore be calculated?
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What is the typical percentage (by mass of elements other than hydrogen and helium in stars that are...
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