Which of the following is true about hydrogen bonds? A. Hydrogen bonds are longer and stronger than covalent bonds. B. The geometry of a water molecule results in the equal sharing of electrons between the hydrogen and oxygen. C. Hydrogen bonds must involve at least one water molecule. D. Polar molecules are soluble in water because they can form hydrogen bonds with water molecules.
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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