Question

1. what is the formula of the compound aluminum phosphide?

a) alp

b) alp2

c) alp4

d) al3p3

Explanation:

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<reasoning>

Identify the charges of the constituent ions

\[

$$\begin{aligned} &\text{Aluminum (Al): Group 13 metal} ightarrow \text{Al}^{3+}\\ &\text{Phosphorus (P): Group 15 nonmetal} ightarrow \text{P}^{3-} \end{aligned}$$

\]

Determine the simplest ratio for a neutral compound

\[

$$\begin{aligned} &1 \times (+3) + 1 \times (-3) = 0\\ &\text{Ratio of Al to P} = 1:1 \end{aligned}$$

\]

Write the empirical chemical formula

\[
\text{Formula} = \text{AlP}
\]
</reasoning>

<answer>
<mcq-correct>(A) AlP</mcq-correct>
<mcq-option>(B) AlP\(_2\)</mcq-option>
<mcq-option>(C) AlP\(_4\)</mcq-option>
<mcq-option>(D) Al\(_3\)P\(_3\)</mcq-option>
</answer>

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Answer:

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<reasoning>

Identify the charges of the constituent ions

\[

$$\begin{aligned} &\text{Aluminum (Al): Group 13 metal} ightarrow \text{Al}^{3+}\\ &\text{Phosphorus (P): Group 15 nonmetal} ightarrow \text{P}^{3-} \end{aligned}$$

\]

Determine the simplest ratio for a neutral compound

\[

$$\begin{aligned} &1 \times (+3) + 1 \times (-3) = 0\\ &\text{Ratio of Al to P} = 1:1 \end{aligned}$$

\]

Write the empirical chemical formula

\[
\text{Formula} = \text{AlP}
\]
</reasoning>

<answer>
<mcq-correct>(A) AlP</mcq-correct>
<mcq-option>(B) AlP\(_2\)</mcq-option>
<mcq-option>(C) AlP\(_4\)</mcq-option>
<mcq-option>(D) Al\(_3\)P\(_3\)</mcq-option>
</answer>

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