Tutor profile: Dora M.
Subject: Basic Math
Convert to decimal number: 2/5
What is the point of throwing salt on the street during the winter when it is very cold ( temperatures in minuses)?
In order to lower the melting point of the water and there is no ice on the street.
Subject: Basic Chemistry
There is sodium ion, potassium ion and chlorine ion in the bowl. How does sodium ion know which one to choose for making compound?
Na+, K+, Cl- plus goes with minus, not with plus.