1. bottle cap should be closed immediately after use was thought to have come from, we use: The bottle should be closed firmly close the lid every time. It should not be closed, or place the lid loosely bawai passively watching television. Substances that absorb moisture easily, such as CaCl2 or NaOH is solid or stick to ooze liquid, if left exposed to air. Volatile compounds such as HCl or NH4OH the concentration will be reduced, and that evaporating may react with other compounds are nearby.
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