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kakasveta [241]
3 years ago
8

Which is true about the symbols assigned to the elements?

Chemistry
1 answer:
igomit [66]3 years ago
4 0

Answer: Option (C) is the correct answer.

Explanation:

Periodic table has different symbols for individual elements which have been discovered till now. As a result, this periodic table is followed internationally as it is approved and doesn't have any flaws.

Thus, we can conclude that out of the given options, they are all recognized internationally is true about the symbols assigned to the elements.

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Answer: It takes 3.120 seconds for the concentration of  A to decrease from 0.860 M to 0.260 M.

Explanation:

Integrated rate law for second order kinetics is given by:

\frac{1}{a}=kt+\frac{1}{a_0}

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\frac{1}{0.260}=0.860\times t+\frac{1}{0.860}

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Thus it takes 3.120 seconds for the concentration of  A to decrease from 0.860 M to 0.260 M.

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