Can you teach me how to do IS homework? (Due on tomorrow!)

2006-11-01 6:39 am

Why should the label of a regaent bottle face the palm when pouring liquid from the bottle?
A. This avoids staining the reagent bottle.
B.This avoids staining the label.
C. The label can prevent the reagent bottle from being broken if your hand silps.
D. This does not allow people to see the hazard warning label of the chmical.

回答 (1)

[匿名]

2006-11-01 6:46 am

✔ 最佳答案

Of course C.

A -- if it stains the bottle, it spills on your hands and you are hurt too.
B -- Same as above, if it stains the label, it spills on your hands, same harm if it is poisonous or corrosive.
D -- What is the point of not allowing people to see it? Are you cheating or something.

C is most probable. This is not really a chemical question. This is only a procedural question. The answer is not exhaustive enough. But can only make educated guess by eliminating the probably wrong answers.

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