3 years ago

Temperature of a substance is determined by

Biology

2 answers:

Ghella [55]3 years ago

8 0

The correct
answer is C.

MatroZZZ [7]3 years ago

5 0

It is the c believe me I am trustworthy

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Which of these is true for both photosynthesis and cellular respiration?

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A certain first-order reaction a â†’ b is 25% complete in 42 min at 25Â°c. What is the half-life of the reaction?

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Answer:

$t_{\frac{1}{2}} = 101.16$ minutes

Explanation:

For a First order reaction, the rate constant is determined by

$k = \frac{2.303}{t} log \frac{a}{a-x}$

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k= rate constant

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a= initial concentration

x= amount of reactant decomposed in time t

a-x= amount of reactant left after time t

Let the initial concentration be $100$

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$k = \frac{2.303}{42} log \frac{100}{75} \\$

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Also,

$k = \frac{0.693}{t_{\frac{1}{2}} } \\t_{\frac{1}{2}} = \frac{0.693}{6.85 *10^{-3}}\\$

$t_{\frac{1}{2}} = 101.16$ minutes

Read more on Brainly.in - https://brainly.in/question/6804668#readmore

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4 years ago