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Aug 29, 2023 · A set unit of prefixes have been established and are known as the SI prefixes or the metric prefixes (or units). The prefixes indicate whether the unit is a multiple or a fraction of the base ten . It allows the reduction of zeros of a very small number or a very larger number such as 0.000 000 001 meter and 7,500,000 Joules into 1 nanometer ...
Learning Objectives. Explain the process of measurement and describe the three basic parts of a quantity. Describe the properties and units of length, mass, volume, density, temperature, and time. Recognize the common unit prefixes and use them to describe the magnitude of a measurement.
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Aug 29, 2023 · Luminous intensity. Candela. cd. Amount of substance. Mole. mol. Close your eyes, and see if you can name the 7 fundamental quantities in science and their (SI) Units. Science is based on only 7 basic quantities; for each, we have to define a standard unit. Think why these are the basic quantities.
Oct 11, 2023 · What does pH measure? pH is a measure of acidity or alkalinity in a solution. It quantifies how acidic or basic a substance is on a scale ranging from 0-14, where 7 is considered neutral. Substances with a pH below 7 are acidic, while those with a pH above 7 are basic or alkaline.
Jul 3, 2019 · rate determining step - The rate determining step is the slowest step in any chemical reaction. rate law - A rate law is a mathematical expression relating the speed of a chemical reaction as a function of concentration. redox reaction - A redox reaction is a chemical reaction that involves oxidation and reduction.
- Anne Marie Helmenstine, Ph.D.
The key features of a chemical equation are pointed out here: Reactants are the substances we start with. They are written on the left side of the arrow. Products are the substances that are created. They are written on the right side of the arrow. The arrow indicates that a chemical change has occurred.
bleach is basically a solution of sodium HypoChlorite, or NaClO. This is a salt that contains the anion of the weak acid HClO, hypochlorous acid, and the cation of the strong base, NaOH. Because NaOH is a strong base, it fully dissociates into Na+ ions and OH- ions. However, the HClO is weak and does not fully dissociate.
