객관식
Which of the following is the correct formula for the ionic compound formed between lithium and bromide?
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객관식
Which of the following is the correct chemical formula for magnesium hydrogen carbonate?
A
MgCO3
B
Mg(HCO3)
C
Mg2CO3
D
Mg(HCO3)2
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검증된 단계별 안내1
Understand the composition of magnesium hydrogen carbonate: it consists of magnesium ions (Mg^{2+}) and hydrogen carbonate ions (HCO_3^{-}).
Recall the charges of the ions involved: magnesium ion has a charge of +2, and hydrogen carbonate ion has a charge of -1.
To write the correct formula, balance the total positive and negative charges so the compound is electrically neutral.
Since magnesium has a +2 charge and hydrogen carbonate has a -1 charge, two hydrogen carbonate ions are needed to balance one magnesium ion.
Combine the ions accordingly to write the formula as \(Mg(HCO_3)_2\), indicating one magnesium ion and two hydrogen carbonate ions.
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