7
QuizMultiple Choice
Unit Test — Unit test
Question 7 • *25-26 KCS18 Chemistry IC
A government laboratory wants to determine whether water in a certain city has any traces of fluoride and whether the concentration exceeds the recommended 4.00 ppm. A 5.00-g sample of this water is found to have 0.152 mg of fluoride. Should the water be declared safe for drinking?Use .
Answer
A
3.04 ppm < 4.00 ppm, safe to drinkB
7.60 ppm > 4 ppm, safe to drinkC
A. 30.4 ppm > 4 ppm, unsafe to drinkD
30,400 ppm > 4 ppm, unsafe to drink