Specific protocol should be followed any time a balance is used to weigh the mass of a chemical or object. Select which rule(s) are part of this protocol. All of these rules are part of the protocol. Glassware, containers, and chemicals should be at room temperature. The same balance should be used throughout an experiment. Glassware must be dried thoroughly before being weighed and all chemicals should be contained in either a piece of glassware or weighboat. All chemicals should be contained in either a piece of glassware or weighboat. Filter paper must be completely dry, even after being used in an experiment.
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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Why should the selected rule(s) be followed?