Young brazilian scientist write chemical formulas on the glass board. Young blonde assistant looking at the color of chemicals to observe the acidity

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Young brazilian scientist write chemical formulas on the glass board. Young blonde assistant looking at the color of chemicals to observe the acidity of the alkalinity.

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Size: 5124px × 3389px
Location: thailand
Photo credit: © chadchai krisadapong / Alamy / Afripics
License: Royalty Free
Model Released: Yes

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