1. A > product A is a radioactive element. The half life of reaction is 20 minutes. a) Sketch a graph of concentration versus time and label half-life of A. b) Caleulate the time required for 95% of A decompose. c) What will happen to the rate if the concentration of A is doubled?

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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.