A pharmacist poured a 4% NaCl solution into a flask already containing a NaCl solution of unknown concentration. If the total volume of the mixed solution in the flask is 200 mL and its concentration is 2.5% NaCl, how many milliliters of the 4% NaCl solution was poured into the flask?

A. 125
B. 150
C. 200
D. 250


Answer: A

Communication & Mass Media

You might also like to view...

Movie making in Iran shares many similarities with classic neo-realism in Italy

Indicate whether this statement is true or false.

Communication & Mass Media

Answer the following statements true (T) or false (F)

1. The most compelling persuasive messages appeal more to ethos and pathos than logos. 2. Before giving a speech, it will help to analyze one’s audience and tailor one’s proposition based on their initial attitude toward the topic. 3. In the context of arguing from sign, signs bring about, lead to, or create the claim. 4. Fallacies refer to errors in reasoning. 5. An audience is not likely to be interested when negative emotions are evoked.

Communication & Mass Media

A short illustration of no longer than a sentence or two is called

A) a hypothetical illustration. B) a brief illustration. C) an explanation. D) a literal illustration.

Communication & Mass Media

Sarah is running as a first-time candidate for her district's board of education. In her speech, Sarah suggests how the educational standards of the schools will take a serious downturn unless she is elected and her ideas put to work. Sarah is using which type of illustration in this situation?

A) personal B) hypothetical C) brief D) extended

Communication & Mass Media