The rate constant for this first‑order reaction is
0.200
s
−
1
at
400

∘
C.

A
⟶
products

How long, in seconds, would it take for the concentration of
A
to decrease from
0.950
M
to
0.300
M?

t
=

s

t = 5.7634 s

Explanation:

∴ T = 400°C

∴ α = 1 first-order

∴ CAo = 0.950 M

∴ CA = 0.300 M

⇒ t = ?

⇒ - δCA/δt = K*CA

⇒ - ∫δCA/CA = K*∫δt

⇒ Ln (CAo/CA) = K*t

⇒ t = Ln(CAo/CA) / K

⇒ t = (Ln(0.950/0.300)) / (0.200 s-1)

⇒ t = 1.1527 / 0.200 s-1

⇒ t = 5.7634 s

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.