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monitta
3 years ago
8

What is the mass of 4.95 x 10^21 platinum atoms?

Chemistry
1 answer:
Allisa [31]3 years ago
6 0
28.............................

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Answer:

Equilibrium constant is 0.4

Explanation:

We propose the equilibrium:

                 PCl₅(g)    ⇄    PCl₃(g)   +    Cl₂(g)

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X amount has reacted, so in the equilibrium we have:

               0.72 - x              0.4               0.4

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Let's make the expression for Kc:

Kc = [PCl₃] . [Cl₂] /  [PCl₅]

Kc =  0.4 . 0.4 / 0.4

Kc = 0.4

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