Answer:
their
Explanation:
Lets highlight the keywords in this sentence.
All the actresses brought (her, their) scripts.
The words all and actresses are telling you that there are more than 1 actress, so we will refer to them as 'their'.
You're starting with
(12.0 mL) (0.550 M) = (0.0120 L) (0.550 M) = 0.00660 mol
of FeCl₃.
For every mole of FeCl₃ in the balanced reaction, you need 3 moles of NH₄OH, so you need a minimum 0.0198 mol NH₄OH per mole FeCl₃.
Then the requisite volume of NH₄OH solution needed is <em>V</em> such that
(0.0198 mol) / <em>V</em> = 0.200 M
Solve for <em>V</em> to get
<em>V</em> = (0.0198 mol) / (0.200 M) = 0.0990 L = 99 mL
By studying pictures and videos and what the teacher taught the whole class
