stephaniepo

我有D 吾明紅框講ge 野 !!  可吾可以詳細解釋咩質量比例個d ,,我吾係好明!!
同埋吾係好明咩係物理方法同 化學方法個d  蒸發  同電解係有咩分別!!    急~ plz

thank you very much ~~~ plzplz t^t

stephaniepo

HELP ME ~

dilloncyh

For example, in sea water(a mixture), you cannot tell how many % of it is pure water, sodium chloride,  water soluble liquid, etc. ie, the proportion of the substances in the mixture is not fixed. For H2O (compound), the proportion of H and O must be 2:1, it cannot be changed.

stephaniepo

THANK YOU ~