Answer: If the light ray hits the boundary at an angle which is not perpendicular to or parallel to the surface, then it will change direction and appear to `bend'
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Answer: When a substance is pure, it is composed of one type of molecule. For example, table salt is only composed of (more or less) salt molecules, while seawater has water and salt molecules. A more complicated example of a non - pure substance is soil. It has many different types of nutrients and compounds.
A chemical reaction is going to be your answer
Answer:
Step-by-step explanation:
Data:
n = 5 mol
V = 2.5 L
Calculation:
The molar concentration of the solution is 
.
