Eliminating which

[Kimawi86]

Hello dears,

I'm wondering if I could say:

Having a good energy density by weight, hydrogen was chosen among other alternatives for many reasons.

or should I say:

Hydrogen which has a good energy density by weight was chosen among other alternatives for many reasons.

With many thanks.
Regards,
Abdul

[Mister Micawber]

Why mention its energy density if it was evidently chosen for other reasons? That makes both sentences awkward.
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Native English teacher at Mister Micawber's

[Kimawi86]

Many thanks. Really, I've not thought about it. What a funny guy I'm.

By the way, what do we call these tools (which, who, where,...)? and where could I find a good article about them?

[Mister Micawber]

Those are relative and interrogative pronouns. You can google those terms, and find sites like THIS and THIS.
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Native English teacher at Mister Micawber's