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What is the percentage of formaldehyde in formalin?
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$40 \%$
Correct answer is $40 \%$
The percentage of formaldehyde in formalin is $40 \%$
$10 \mathrm{ml}$ formalin contains $40 \mathrm{ml}$ formaldehyde and $60 \mathrm{ml}$ of water.
The percentage of formaldehyde in formalin is $40 \%$
$10 \mathrm{ml}$ formalin contains $40 \mathrm{ml}$ formaldehyde and $60 \mathrm{ml}$ of water.
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