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nevsk [136]
3 years ago
8

I will mark brainliest!

Chemistry
2 answers:
olganol [36]3 years ago
8 0

Answer:

C ! :)

Explanation:

AnnyKZ [126]3 years ago
6 0

Answer:

The correct answer is A

Explanation:

<em><u>LOW-DENSITY PARRTICLE</u></em>

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Number of molecules in 4HCl​
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Atoms have been traditionally viewed as being composed of three different types of particles: protons, neutrons, and electrons.
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Answer:

See explanation

Explanation:

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2. Answer this question: Lava rocks I nature come in different shapes and sizes. What processes do you think are responsible the
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Explanation:

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3 years ago
What is a societal law
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Societal law is a rule which stretches out to ones in and by the public
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Read 2 more answers
In a first-order decomposition reaction, 50.0% of a compound decomposes in 10.5 min.
mihalych1998 [28]

In this reaction 50% of the compound decompose in 10.5 min thus, it is half life of the reaction and denoted by symbol t_{1/2}.

(a) For first order reaction, rate constant and half life time are related to each other as follows:

k=\frac{0.6932}{t_{1/2}}=\frac{0.6932}{10.5 min}=0.066 min^{-1}

Thus, rate constant of the reaction is 0.066 min^{-1}.

(b) Rate equation for first order reaction is as follows:

k=\frac{2.303}{t_{1/2}}log\frac{[A_{0}]}{[A_{t}]}

now, 75% of the compound is decomposed, if initial concentration [A_{0} ] is 100 then concentration at time t [A_{t} ] will be 100-75=25.

Putting the values,

0.066 min^{-1}=\frac{2.303}{t}log\frac{100}{25}=\frac{2.303}{t}(0.6020)

On rearranging,

t=\frac{2.303\times 0.6020}{0.066 min^{-1}}=21 min

Thus, time required for 75% decomposition is 21 min.

8 0
3 years ago
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