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vanessagomezcx
07.03.2020 •
Chemistry
The rate constant for this first-order reaction is 0.0265 s − 1 at 300 °C. A ⟶ products If the initial mass of A is 16.74 g, calculate the mass of A remaining after 1.27 min.
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Ответ:
Answer : The mass of A remaining after 1.27 min is, 13.7 grams
Explanation :
Expression for rate law for first order kinetics is given by:
where,
k = rate constant =![0.0265s^{-1}](/tpl/images/0537/3152/950f2.png)
t = time passed by the sample = 1.27 min = 76.2 s (1 min = 60 s)
a = initial amount of the reactant = 16.74 g
a - x = amount left after decay process = ?
Now put all the given values in above equation, we get
Therefore, the mass of A remaining after 1.27 min is, 13.7 grams
Ответ:
c
Explanation:
I think that's the answer