This equation models how pure silver (Ag) is extracted from ores of AgK(CN)₂ (potassium argentocyanide), which is mined from the earth. Zinc is a reactant in the equation, and it is needed in order to extract the silver from the potassium argentocyanide ore. 2AgK(CN)2 (aq) + Zn(s) → 2 Ag(s) + Zn(CN)2(aq) + 2KCN(aq) 2004 IN GOD WE TRUST Public Doman: https://commons.wikimedia.org/wiki/File:American Silver Eagle, obverse, 2004.jpg#file How many atoms of pure zinc (Zn) are needed in the production process to create a pure silver coin of mass 38 grams? Answer: Zn atoms If needed, enter scientific notation with the "e". For example, 1.44×107 would be entered as 1.44e7.

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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.