For which of the following pairings is the substance with the higher melting point listed first I. NH3 and CH4 II. CH4 and C₂H4 III. CH3CH₂CH₂NH2 and CH₂CH₂CH₂CH3 O I, II and III III only I only O I and II OI and III II and III
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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