A student believes that a sample of solid CaCl2 may be contaminated with KNO3(3). Knowing that pure CaCl (s) contains 64% chlorine by mass, the student performs an experiment to determine the mass
percent of chlorine in the sample of CaCl2 (3)
Which of the following results for the mass percent would best support the student's claim that the
sample of CaCl (s) is contaminated with KNO3(s)?​

the answer is 75.0%.

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.