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QveST [7]
3 years ago
11

Which of these is a common to all chemical changes

Chemistry
2 answers:
Kamila [148]3 years ago
5 0
C. A new substance is produced. All others are physical changes.
KiRa [710]3 years ago
3 0

Answer:

c

a new substance is produced

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The charge carried by each ion (oxidation state of each atom)

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If we have an ionic compound and we want to write its formula, we must first know the magnitude of charge on each ion (shown as oxidation state of the atoms involved) because the magnitude of charge on each ion is eventually crisscrossed and gives the subscript (number of atoms) for each atom in the formula.

For instance, let us write the formula of calcium bromide. Ca has a charge of +2 while Br has a charge of -1. If we exchange the charges and ignore the signs such that the crisscrossed charges form subscripts we can now write; CaBr_{2}.

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The correct answer is B)About 5 percent

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How does the precision of the absolute-age dating compare to the precision of relative-age dating?
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