Copper pyrites, also known as chalcopyrite, is the most important and abundant ore of copper. Its chemical formula is CuFeS2. Bauxite is the ore of aluminum, cinnabar is the ore of mercury, and haematite is the primary ore of iron.
Explanation:
Hydrochloric acid (HCl) is a strong acid because it completely dissociates into H⁺ and Cl⁻ ions in aqueous solution. Acetic, citric, and carbonic acids are weak acids as they only partially dissociate in water, establishing an equilibrium between the unionized molecules and their ions.
Explanation:
The head (–COO⁻) is ionic and attracted to water (hydrophilic). The long hydrocarbon tail is non-polar and hydrophobic, dissolving in grease. This amphiphilic nature allows cleaning.
Explanation:
N₂ has a triple bond (N≡N), consisting of one sigma and two pi bonds. This is the strongest type of covalent bond, giving N₂ high stability and low reactivity. Bond order is 3. The molecule is diatomic and nonpolar.
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