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Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z
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Ammonium perchlorate nh4clo4 is the solid rocket fuel used by the u. s. space shuttle. it reacts with itself to produce nitrogen gas n2 , chlorine gas cl2 , oxygen gas o2 , water h2o , and a great deal of energy. what mass of nitrogen gas is produced by the reaction of 2.1g of ammonium perchlorate?
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Which of these features are formed when hot groundwater is forced out through cracks in the earth's surface?
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Any two substances which are odourless...
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