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Evgen [1.6K]
3 years ago
6

isotopes of an element have the same number of protons but a different number of neutrons below u will see the nucleus of four d

ifferent atoms which atoms are isotopes of each other( there no pic i guess)
Chemistry
1 answer:
dexar [7]3 years ago
3 0
What is your question? Its not clear
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The half life for the first order conversion of A to B is 56.6 hours. How long does it take for the concentration of A to decrea
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It will take 188.06 hours for the concentration of A to decrease 10.0% of its original concentration.

Explanation:

A → B

Initial concentration of the reactant = x

Final concentration of reactant = 10% of x = 0.1 x

Time taken by the sample, t = ?

Formula used :

A=A_o\times e^{-\lambda t}\\\\\lambda =\frac{0.693}{t_{\frac{1}{2}}}

where,

A_o = initial concentration of reactant

A = concentration of reactant left after the time, (t)

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\lambda = rate constant

A=A_o\times e^{-(\frac{0.693}{t_{1/2}})\times t}

Now put all the given values in this formula, we get

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