5.) Which of the following statements CORRECTLY describes why oxygen is more abundant on earth's crust than nitrogen? XOY. Both of these substances are gases, which were held loosely by the weak gravity of earth during its early formation. XLY. Oxygen is a reactive gas that formed gaseous oxides of nitrogen, carbon, sulfur. XKY. Nitrogen gas is not formed during the big bang nucleosynthesis. XNY. High melting metal oxides were formed when oxygen reacts with the metal, then present on earth.

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Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.