Where are elements that form molecules of two of the same atoms commonly found on the periodic table?

2 answers:

8 0

The seven exceptions to that are the seven elements that are in gaseous form as a diatomic molecule, that is, two atoms of the same element attached to each other. The list of these elements is best memorized. They are: hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, and iodine. Was this helpful??

Sveta_85 [38]2 years ago

6 0

Elements that form diatomic molecules, or molecules of two atoms each, are commonly found on the right side of the periodic table.

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Given the reaction: Ca + 2H2O → Ca(OH)2 + H2 What is the total number of moles of Ca needed to react completely with 4.0 moles o

DiKsa [7]

Answer: The number of moles of calcium metal required is 2.0 moles.

Explanation:

We are given:

Moles of water reacted = 4.0 moles

The given chemical reaction follows:

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By Stoichiometry of the reaction:

2 moles of water is reacted with 1 mole of calcium metal

So, 4.0 moles of water will react with = $\frac{1}{2}\times 4.0=2.0mol$ of calcium metal

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Explanation: