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Phantasy [73]
3 years ago
9

Which of the following is a monatomic anion? a) NH4+ b) Fr+ c) SO42– d) F-

Chemistry
2 answers:
Y_Kistochka [10]3 years ago
8 0
I think that it's d) F- but I'm not sure.
spin [16.1K]3 years ago
4 0

Answer:

d) F⁻

Explanation:

An anion is an ion that has a net negative charge. Ions such as OH⁻, NO₃⁻ or Cl⁻ are anions.

Monatomic means that it is made of only one atom. Mono=one. Ions such as H⁺, Na⁺ or S²⁻ are monoatomic, whereas ions such as OH⁻, NH₄⁺ or CN⁻ are <u>polyatomic</u>.

With this information in mind, the option that is both monatomic and an anion is d), F⁻.

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Gallium is produced by the electrolysis of a solution made by dissolving gallium oxide in concentrated NaOH ( aq ) . Calculate t
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Answer:

Approximately 6.30\times 10^{-3}\;\rm mol.

Explanation:

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\begin{aligned} n(\text{electrons}) &= \frac{Q}{F} \cr &= \rm \dfrac{1.824\times 10^3\; C}{96485.332\; C \cdot mol^{-1}}\cr &\approx \rm 1.89\times 10^{-2}\; mol \end{aligned}.

It takes three moles of electrons to deposit one mole of gallium atoms \rm Ga\, (s). As a result, \rm 1.89\times 10^{-2}\; mol of electrons would deposit \displaystyle \rm \frac{1}{3}\times 1.89\times 10^{-2}\; mol \approx 6.30\times 10^{-3}\; mol of gallium atoms \rm Ga\, (s).

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