Some thermometers contain alcohol. Alcohol is used in thermometers because it:.

1 answer:

6 0

Because alcohol expands over small temp changes, hence while a vial of it is used in sprinklers as the stop plug; the room gets hotter, the plug shatters.

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What is the pH of a solution of 0.800 M KH2PO4, potassium dihydrogen phosphate?

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KH₂PO₄ hydrolyzes as;
H₂PO₄⁻ + H₂O ↔ H₃PO₄ + OH⁻
Let x amount of H₂PO₄⁻ has reacted with water then,
Kb₁ = [H₃PO₄][OH⁻] / [H₂PO₄⁻]
[H₂PO₄⁻] = 0.8-x M
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Given Ka₁ = 7.5 x 10⁻³
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From this information:
1.33 x 10⁻¹² = x² / 0.8
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pOH = - log (1.03 x 10⁻⁶) = 5.99
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what is a photoelectric?explain the terms ground state and excited state with the help of labelled diagram

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Excited state is the state which represents a high energy state.

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