2 years ago

What was John Dalton's contribution to the development of the atomic theory?

Chemistry

1 answer:

Tpy6a [65]2 years ago

3 0

Answer:

<h3>A. Dalton recognized that tiny atoms combined to form complex structures. </h3>

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What is the mass of 3.8 × 1024 atoms of argon (Ar)?

gulaghasi [49]

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x g Ar.......3.8*10^24 atoms
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3 years ago

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A student prepares a 0.47mM aqueous solution of acetic acid CH3CO2H. Calculate the fraction of acetic acid that is in the dissoc

Aliun [14]

The fraction of acetic acid that is dissociated is 0.18

Why?

The chemical equation for the dissociation of acetic acid (HAc) is the following:

HAc(aq) + H₂O(l) ⇄ H₃O⁺(aq) + Ac⁻(aq)

To find the fraction of acetic acid that is in the dissociated form (f), we apply the following equation (Ka for acetic acid is 1.76*10⁻⁵). This equation comes from solving the equation of the equilibrium constant for the dissociated fraction of HAc:

$f=\frac{-Ka+\sqrt{Ka^{2} +4KaC} }{2C} = 0.18$

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3 years ago