Interpretation:
A short paragraph describing the life before the development of
Concept introduction:
Synthetic polymers are man-made polymers. They are formed by arranging the repeating units of atoms forming the long chains. The strength of the
Explanation of Solution
The discovery of synthetic polymers makes the manufacturing by human independent of the limited amount of natural materials. One can obtained wood, metal, stone etc from nature but after the discovery of synthetic polymers, humans can variety of new materials. The discovery of synthetic polymers helped people as well as environment. The use of synthetic polymers can protect the
The scarcity of the natural resources cannot affect the needs of the people if new materials are created. Before the plastic was invented, only substance that could be molded was glass and clay. For the storage process, hardened glass and clay is used due to their heavy and brittle nature. Some of the natural substances are sticky and can be mold such as rubber, tree gums etc. Rubber cannot be used for storage because when it is heated, it becomes sticky. Also, it loses its ability to get back into its shape.
Chapter 22 Solutions
Chemistry: Matter and Change
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- Reagan is doing an atomic absorption experiment that requires a set of zinc standards in the 0.4- 1.6 ppm range. A 1000 ppm Zn solution was prepared by dissolving the necessary amount of solid Zn(NO3)2 in water. The standards can be prepared by diluting the 1000 ppm Zn solution. Table 1 shows one possible set of serial dilutions (stepwise dilution of a solution) that Reagan could perform to make the necessary standards. Solution A was prepared by diluting 5.00 ml of the 1000 ppm Zn standard to 50.00 ml. Solutions C-E are called "calibration standards" because they will be used to calibrate the atomic absorption spectrometer. Table 1: Dilutions of Zinc Solutions Solution Zinc Solution Volume Diluted Solution Concentration used volume (ppm Zn) (mL) (mL) concentration (ppm Zn) Solution concentration A 1000 5.00 50.00 1.00×10² (ppm Zn(NO3)2) 2.90×10² Solution concentration (M Zn(NO3)2 1.53×10-3 B Solution A 5.00 100.00 5.00 C Solution B 5.00 50.00 0.50 7.65×10-6 D Solution B 10.00 50.00…arrow_forwardNonearrow_forwardNonearrow_forward
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