H2O, NaCl and CO2 are in different phases at room temperature as a result of their boiling, melting, and freezing point. The temperature required to freeze or boil a compound is a result of their intermolecular forces within their bonds. The stronger the bond, the harder it is to break it apart, which is what causes it to transform into a gas.
Brainliest answer please?
Leaves of aquatic plants are covered by a waxy cuticle which does not allow the water to wet them.
Answer:
pH = 7.46.
Explanation:
- The ionization of water is given by the equation :
<em>H₂O(l) ⇄ H⁺(aq) + OH⁻(aq),</em>
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- The equilibrium constant (Kw) expression is:
<em>Kw = [H⁺][OH⁻] = 0.12 x 10⁻¹⁴. </em>
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in pure water and neutral aqueous solution, [H⁺] = [OH⁻]
So, Kw = [H⁺]²
∴ 0.12 x 10⁻¹⁴ = [H⁺]²
∴ [H⁺] = 3.4 x 10⁻⁸ M.
∵ pH = - log [H⁺]
pH = - log (3.4 x 10⁻⁸) = 7.46.
The correct answer would be b. However they are also all numbered. But the correct answer is B Chemical Symbols.
