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11111nata11111 [884]
3 years ago
13

Results in science are not generally accepted as being accurate until they can be verified. Which of the following is an example

of repetition in science? A.A student designs an experiment on plant growth that includes multiple trials. B.One scientist carries out the same experiment performed by another scientist to validate the results. C.A scientist poses a new question for investigation after reading the results of another scientist’s work. D.A scientist analyzes the data included in the published work of another scientist and agrees with the conclusions
Biology
2 answers:
julsineya [31]3 years ago
7 0

Answer:

B) One scientist carries out the same experiment performed by another scientist to validate the results.

Explanation:

repetition definition is basically B.

Vsevolod [243]3 years ago
4 0

Answer:

The answer is B

Explanation:

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3 years ago
A certain first-order reaction a → b is 25% complete in 42 min at 25°c. What is the half-life of the reaction?
yan [13]

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}

Where

k= rate constant

t= time required for a reaction

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

Then

x = 25\\a-x = 75

Substituting the given values in above equation, we get -

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

k = 6.85 *10^{-3}

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
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