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den301095 [7]
3 years ago
12

A 2 kg bowlling ball is 2.5 meters off the ground on a post when it falls just before it reachers the ground it is traveling m/s

assuming that there is no air resistance is true
A;The mechanical energy is conserved

B;The initial potential energy is greater than the final kinetic energy

CThe initial potential energy is less than the final kinetic energy

D;The mechanical energy is not conserved
Chemistry
1 answer:
Alchen [17]3 years ago
6 0
The mechanical energy is conserved 
Choice A
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Answer : The concentration after 17.0 minutes will be, 4.05\times 10^{-4}M

Explanation :

The expression for first order reaction is:

[C_t]=[C_o]e^{-kt}

where,

[C_t] = concentration at time 't'  (final) = ?

[C_o] = concentration at time '0' (initial) = 0.100 M

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Now put all the given values in the above expression, we get:

[C_t]=(0.100)\times e^{-(5.40\times 10^{-3})\times (1020)}

[C_t]=4.05\times 10^{-4}M

Thus, the concentration after 17.0 minutes will be, 4.05\times 10^{-4}M

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