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MaRussiya [10]
3 years ago
12

A reaction x  y has a rate constant of 1.37 hr–1 and is allowed to react for 1.2 hours. if the final concentration of x is 0.21

m, what was the original concentration of x?

Chemistry
1 answer:
lawyer [7]3 years ago
5 0
The unit measurement of the rate constant is a guide to tell you the rate order. If it's unit is 1/time, then it is a first-order reaction. From the picture attached, the formula to be used would be:

ln[A] = ln[A₀] - kt
ln[0.21] = ln[A₀] - (1.37)(1.2)
Solving for A₀,
A₀= 1.09 M

<em>Hence, the original concentration of X was 1.09 M.</em>

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