Given that zinc chloride has a formula weight of 136.28 amu, what is its formula?

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Given that zinc chloride has a formula weight of 136.28 amu, what is its chemical formula?

Anonymous · Accepted Answer

Well, we know that zinc has an atomic weight of 65.384 amu, and chlorine has an atomic weight of 35.453 amu.
If the formula was ZnCl, then the molecular weight would be 65.384 + 35.453 = 100.837 amu -- hmmm, that's too low by about 136.28 - 100.837 = 35.443 amu -- which is almost exactly the mass of another chlorine atom! (The "missing mass" is involved in the bonding energy).
Therefore, the molecular formula MUST be ZnCl2

Anonymous · Answer

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Given that zinc chloride has a formula weight of 136.28 amu, what is its formula?

Anonymous · Answer

Amu Formula

Anonymous · Answer

well lets see,
zinc weights 65.4amu
Chlorine weighs 35.4amu
If we have one zinc and 2 chlorines, we have a molecule with about 136.28amu
ZnCl2 is the molecular formula

Anonymous · Answer

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Anonymous · Answer

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Given that zinc chloride has a formula weight of 136.28 amu, what is its formula?

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