Fill in the blanks.
Experiment and ___________ are the two important basics of chemistry.
________ fan are fitted near the roof of the walls to expel _________ gases.
We observe chemical processes to observe ___________.
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Fill in the blanks.
Experiment and ___________ are the two important basics of chemistry.
________ fan are fitted near the roof of the walls to expel _________ gases.
We observe chemical processes to observe ___________.
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Experiment and observation are two important basics of chemistry
Exhaust fans are fitted near the roof of the wall to expel hot gases
We observe chemical processes to observe permanent changes
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