Multiple Choice
Which of the following is the correct chemical formula for ammonium bromide?
3. Chemical Reactions
Writing Ionic Compounds
Multiple Choice
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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