Multiple Choice
Which of the following is the correct chemical formula for ammonium bromide?
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3. Chemical Reactions
Writing Ionic Compounds
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Which of the following is the correct chemical formula for lead(II) sulfide?
A
PbS2
B
Pb2S3
C
Pb2S
D
PbS
Verified step by step guidance1
Identify the ions involved in lead(II) sulfide: lead(II) ion is Pb^{2+} and sulfide ion is S^{2-}.
Write the charges of each ion: Pb^{2+} has a charge of +2, and S^{2-} has a charge of -2.
Determine the ratio of ions needed to balance the charges so the compound is electrically neutral.
Since the charges are equal and opposite (+2 and -2), one Pb^{2+} ion will balance with one S^{2-} ion.
Write the chemical formula by combining one Pb^{2+} ion and one S^{2-} ion, resulting in PbS.
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