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Marta_Voda [28]
3 years ago
5

By definition, all acids are harmful for human beings. true or false

Chemistry
2 answers:
bixtya [17]3 years ago
7 0

Answer:

true

Explanation:

mel-nik [20]3 years ago
5 0

Answer:

False :<

Explanation:

Yes, alot of acids are harmful, but there are also acids such as oranges. :)

Hope this helps.

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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:

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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

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2 years ago
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source: wikapedia
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