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A student is given a sample in lab that contains one of the ions listed below. After adding a few drops of AgNO3 solution to a portion of the unknown sample, the student observed a grayish precipitate. After adding a few drops of Mg(NO3)2 solution to another portion of the unknown sample, the student got a black precipitate. Based on these observations, what is the only possible ion in this student’s sample?

Nitrous acid is a weak acid. What is the net ionic equation for the reaction that occurs between nitrous acid and strontium hydroxide?

The ground-state valence-shell configuration of a particular atom is 5s2 4d10 5p1.  The element to which this atom belongs is a

Regarding the bedroom wing, ____________.

Which reactants must have reacted to form the products Ba(ClO4)2(aq) and 2H2O(l)?

The heating installation includes ___________.

Which of the following conversions is not an oxidation–reduction reaction?

Regarding brick – veneer walls, _______________.

Regarding foundation walls, _____________>

The products of the following reaction areBaCl2(aq) + Li2SO4 (aq) ®