What is the name for the type of graph shown in the image below?
Vertical
1. Histogram
2. Stem-and-leaf
3. Cumulative frequency
4. Bar graph
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Ответ:
A weak base is one that only dissociates into ions partially in solution, providing OH- ions to the medium. Weak bases are weak electrolytes.
a few common weak bases are ammonia and pyridine, whose reactions with water are
NH3 (aq) + H2O (l) ⇄ NH4+(aq) + OH-(ac)
C5H5N(aq) + H2O(l) ⇄ C5H5NH+(aq) + OH-(aq)
so, Lydia and Damien could have taken a bottle of ammonia and a bottle of pyridine.