3 years ago

Which of the following is not true about compounds?

Chemistry

2 answers:

Lelu [443]3 years ago

7 0

Answer:

C. Elements can combine in any proportion to form a compound.

Explanation:

finlep [7]3 years ago

4 0

Answer:

Elements can combine in any proportion to form a compound. -third choice

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How do you do this?

Alona [7]

It would be Atom 2 because the proton and neutron are both nine and the election is 8 which is -1 to nine <span />

7 0

3 years ago

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:

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