Chemistry, 19.03.2021 20:40 dayanara72
Calculate the heat required to raise the temp of 10.5 grams of solid from -243 degrees Celsius to -223 degrees Celsius give the full work
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Drive down any three characteristic of modern periodic table
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Chemistry, 22.06.2019 05:00
1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false
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What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots
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Calculate the heat required to raise the temp of 10.5 grams of solid from -243 degrees Celsius to -2...
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