The concentration of Sodium Fluoride in a community’s drinking water is 0.6ppm.express this concentration as a percentage:
- a- 0.00006%***
- b- 0.0006%
- c- 0.006%
- d- 0.06%
- e- 0.6%
The correct answer is a. 0.00006%.
To convert ppm (parts per million) to a percentage, you need to multiply the ppm value by 0.0001. In this case, 0.6 ppm x 0.0001 = 0.00006%.
The other options are incorrect:
- b. 0.0006% would be the result of multiplying 0.6 ppm by 0.001, which is equivalent to 1 ppm.
- c. 0.006% would be the result of multiplying 0.6 ppm by 0.01, which is equivalent to 10 ppm.
- d. 0.06% would be the result of multiplying 0.6 ppm by 0.1, which is equivalent to 100 ppm.
- e. 0.6% would be the result of dividing 0.6 ppm by 10, which is equivalent to 60 ppm.
