Технический фосфид цинка содержит металлический цинк в виде смеси. В результате взаимодействия технического фосфида и соляной кислоты было получено 8,96 л фосфина и 2,24 л водорода. Какова массовая доля фосфида цинка в техническом фосфиде?​

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

if you're asking what comes out, it's steam.

yes

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