A container of hot liquid is placed in a freezer that is kept at a constant temperature, 20 °F. The initial temperature of the liquid is 180° F. After 5 minutes, the liquid's temperature 140° F. How much longer will it take for its temperature to decrease to 80 F?

Q: H,C. а) CH3 CH, COOCH, 'COOCH3

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Q: time re

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Q: (Phs) P -CH

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Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.