Chemistry, 14.08.2020 03:01 Peterson6164
The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has elapsed? Report your answer to 1 decimal place.
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Calculate the molarity of 48.0 ml of 6.00 m h2so4 diluted to 0.250 l .
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Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from
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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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The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be...
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