The slightest change in room temperature can cause noticeable changes in the weight of the sample being weighed. Strict temperature control is not needed to give accurate readings on the balance. Select one: a. Both statements are correct. b. The first statement is correct; the second statement is incorrect c. Both statements are incorrect. d. The first statement is incorrect; the second statement is correct. When reading a scale of the side of the container with a meniscus, such as graduated cylinders, it is important that the measurements accounts for the meniscus. Select one: a. True b. False Calibration must be properly done to ensure that glassware and equipment are in good working condition. Anybody can perform calibration of an equipment. Select one: a. Both statements are correct. b. Both statements are incorrect. c. The first statement is incorrect while the second statement is correct. d. The first statement is correct while the second statement is incorrect
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
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