A laboratory instructor gives a sample of amino-acid powder to each of four students, I, II, III, and IV, and they weigh the samples. The true value is 8.72 g. Their results for three trials areI: 8.72 g, 8.74 g, 8.70 g                   II: 8.56 g, 8.77 g, 8.83 gIII: 8.50 g, 8.48 g, 8.51 g                 IV: 8.41 g, 8.72 g, 8.55 g(a) Calculate the average mass from each set of data, and tell which set is the most accurate.(b) Precision is a measure of the average of the deviations of each piece of data from the average value. Which set of data is the most precise? Is this set also the most accurate?(c) Which set of data is both the most accurate and the most precise?(d) Which set of data is both the least accurate and the least precise?

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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.