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Alex17521 [72]
3 years ago
13

A(n) ________ Exposure is a short term or brief exposure that may create an immediate health hazard. A. Acute B. Chronic C. Emer

gency D. Short
Chemistry
2 answers:
Yanka [14]3 years ago
7 0
A(n) Acute exposure is a short term or brief exposure that may create an immediate health hazard. Answer: A)
Elina [12.6K]3 years ago
4 0

Answer: A. Acute

Explanation:

An acute exposure can be define as the exposure of the substance, a living agent or organism to a radiation, substance, particle or poison for a short period of time. These radiation, particle, substance or poison are capable of causing harm to the exposed agent causing health hazards which show immediate symptoms.  

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Which is longer, the carbon-oxygen single bond in a carboxylic acid or the carbon-oxygen bond in an alcohol?
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The carbon-oxygen single bond in a carboxylic acid
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Calculate the pH at the equivalence point for the titration of 0.110 M methylamine (CH3NH2) with 0.110 M HCl. The Kb of methylam
nikklg [1K]
The reaction between the reactants would be:

CH₃NH₂ + HCl ↔ CH₃NH₃⁺ + Cl⁻

Let the conjugate acid undergo hydrolysis. Then, apply the ICE approach.

             CH₃NH₃⁺ + H₂O → H₃O⁺ + CH₃NH₂
I                0.11                       0             0
C               -x                          +x           +x
E            0.11 - x                     x             x

Ka = [H₃O⁺][CH₃NH₂]/[CH₃NH₃⁺]

Since the given information is Kb, let's find Ka in terms of Kb.

Ka = Kw/Kb, where Kw = 10⁻¹⁴

So,
Ka = 10⁻¹⁴/5×10⁻⁴ = 2×10⁻¹¹ = [H₃O⁺][CH₃NH₂]/[CH₃NH₃⁺]
2×10⁻¹¹ = [x][x]/[0.11-x]
Solving for x,
x = 1.483×10⁻⁶ = [H₃O⁺]

Since pH = -log[H₃O⁺],
pH = -log(1.483×10⁻⁶)
<em>pH = 5.83</em>


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