Question

1. A 140-ml tube of tooth paste contains 0.3% my of Sodium fluoride what mass of Sodium fluoride is in the field.​

Answer 1

To achieve the benefits of fluoride use, a toothpaste must have a concentration of at least 1,000 parts per million (ppm). Most commercial brands contain between 1,350 ppm and 1,450 ppm, usually in the form of sodium fluoride or sodium monofluorophosphate .