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Which of the following is the correct chemical formula for cobalt(II) sulfide?
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3. Chemical Reactions
Writing Ionic Compounds
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Which of the following is the correct chemical formula for ammonium bromide?
A
NH4B
B
NH4Br
C
NH4Br2
D
NH3Br
Guida verificata passo dopo passo1
Identify the ions involved in ammonium bromide: ammonium is a polyatomic cation with the formula \(\mathrm{NH_4^+}\), and bromide is a monatomic anion with the formula \(\mathrm{Br^-}\).
Recall that ionic compounds are electrically neutral, so the total positive charge must balance the total negative charge.
Since ammonium has a charge of +1 and bromide has a charge of -1, they combine in a 1:1 ratio to form a neutral compound.
Write the chemical formula by placing the cation first followed by the anion, resulting in \(\mathrm{NH_4Br}\).
Verify that the formula \(\mathrm{NH_4Br}\) correctly represents one ammonium ion combined with one bromide ion, making it the correct formula for ammonium bromide.
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