chem
Substances can exist in each of these three states:
– solid
– liquid
– gas
• depending on the temperature and pressure.
The solid state
• Solids have:
• definite shape and definite volume • high density
• small compressibility
• very small thermal expansion
• Solid molecules are packed closely and rigidly together, so that they cannot easily slide past each other (potential energy dominates).
The liquid state
- Liquids have:
• indefinite shape and definite volume • high density
•
JOJO
6.The functions of body language within communication:
-Definition: As difficult as it is to prise apart the functions of verbal and non-verbal communication, researchers have over the years been able to identify some basic functions of body language within the communication process.
-These functions generally fit within one of several general categories:
+ Regulating:Body language serves the function of pacing and regulating communication. For instance, in a group of people, there are a number of
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culture consist of the share products of human groups. These products include both physical objects and beliefs, values and behavior shared by a group. Material includes beliefs, family patterns, ideas, language, political and economic system, rules, skills, and work practiceChemistry Mid-Term Exam
1.Define Organic Chemistry (study of things that contain carbon. there are more of these than inorganic compounds), Inorganic Chemistry (study of things that don’t contain carbon), Physical Chemistry (study of energy formed by a chemical reaction), Analytical chemistry (study of the composition of different kinds of matter), Biochemistry (study of the chemistry of living things).
2.Why are there more organic than inorganic compounds known to chemistry? b/c there are more compounds that contain carbon
chemistry
Covalent and ionic atomic sizes: covalent radius, which is defined as one-half the distance between the nuclei of two identical atoms when they are joined by a covalent bond (this measurement is possible because atoms within molecules still retain much of their atomic identity). Ionic radius is the measure used to describe the size of an ion. Ionization energy: Energy required to remove an electron from a gaseous atom or ion. Electron affinity: Electron affinity (the energy associated with forming
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Which state of matter has a definite volume and a definite shape? Solid
Which state of matter has a definite volume but not a definite shape? Liquid
Which state of matter does not have a definite volume nor a definite shape? Gas
Homogeneous mixtures can or cannot be filtered? Cannot
All heterogeneous mixtures can be filtered. True
In a mixture, the substances are or are not chemically combined? Not chemically combined
n a mixture the substances can be separated by chemical or physical processes? Physical
An
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