Question

The addition of 50 g of salt to a sample of pure water causes its freezing point to be reduced from 0.0°C to -3. 15° C. Determine how by how many degrees the freezing point dropped for every 10 g of salt added.

Answer 1

15.8° C
4.69° C
0.63° C
0.32° C

Answer 2

isn't this math? and I don't really understand the question really but I know the metric system completely..