3 years ago

You have left the carton of milk out of the refrigerator overnight and it has spoiled. This is an example of a _________.

1 answer:

5 0

Chemical change. Compounds and molecules in the milk are reacting with the air and breaking down and forming new molecules.

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A reaction in which two light nuclei combine to form a heavier nucleus is termed

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Fusion............................................................................

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4 years ago

Definition in your own words

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Answer:

Liquid,gas,solid and plasma

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There four phases of matter. These phases are the gas phase(steam), the liquid phase(water), the solid phase(Ice) and finally the plasma phase(moucous).

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3 years ago

The rules for naming alkanes, alkenes, and alkynes are

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almost the same

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2 years ago

At 25 °C, what is the hydroxide ion concentration, [OH-], in an aqueous solution with a hydrogen ion concentration of

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The hydroxide ion concentration, [OH-] = 2.439 x 10⁻¹⁰

<h3>Further explanation</h3>

Equilibrium of water and the ions :

$\tt 2H_2O(l)\rightarrow H_3O^+(aq)+OH^-(aq)$

$\tt Kc=\dfrac{[H_3O^+][OH^-]}{H_2O}$

Kc[H₂O] is the ion equilibrium constant for water ⇒ Kw.

The product of the concentrations of these ions (H₃O⁺ and OH⁻)at equilibrium at 25°C is 1.0 x 10⁻¹⁴ M

[H₃O⁺] [OH⁻] = 1.0 x 10⁻¹⁴ M = Kw

The hydrogen ion concentration of [H⁺]=4.1 x 10⁻⁵ M, so the hydroxide ion concentration, [OH-] :

$\tt 4.1\times 10^{-5}\times [OH^-]=1.10^{-14}\\\\(OH^-]=\dfrac{1.10^{-14}}{4.1\times 10^{-5}}\\\\(OH^-]=2.439\times 10^{-10}$

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3 years ago

The Sulphate of x is XSO4 valency of x is

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Answer: m mm

/lk ac

Explanation:

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