. What is electronegativity?
2. compare polar and non-polar molecules.
3. Explain and give examples of covalent bonds, polar covalent bonds, and ionic bonds.
4. Why do Non-Polar molecules not mix with water?
<span> 5. How does soap work?</span>
Answer:
Dissolving a solid in liquid, such as table salt in water, is a physical change because only the state of the matter has changed.
Explanation:
Answer:
1
Explanation:
A <em>simple cubic unit cell</em> means that there is 1 atom of Hg in each of the eight corners of a cube. Each of these atoms "contributes" one-eight (1/8) of its mass to form one single unit. With 8 atoms each contributing 1/8, the unit cell has a total of one atom of Hg.
Water is called "universal solvent" because it is capable of dissolving various types of substances than any other solvent. The water's chemical composition such as its atoms that have a balance electrical charge and arrangement of polar makes it capable of dissociating different ionic compounds and balanced attraction to sodium and other elements, suitable to nature of any substances or life forms. However, this could be a problem in everyday life because given the title "universal solvent", it does not necessarily dissolve every compound. For example: water alone cannot be used in cleaning oils because it can't dissolve waxes and fats, and in dissolving large amounts of salt or sugar in our body.
Color change. Smell change. Or temperature change. All are signs of chemical reaction