The specialized type of cell in human eyes which help to detect color, a layer at the back of the eyeball containing cells that are sensitive to light and that trigger nerve impulses that pass via the optic nerve to the brain, that is called a retina.

7 0

4 years ago

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If it takes 87.0 min for the concentration of a reactant to drop to 20.0% of its initial value in a first-order reaction, what i

charle [14.2K]

Answer:

0.0185 min⁻¹

Explanation:

Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

Where,

$[A_t]$ is the concentration at time t

$[A_0]$ is the initial concentration

Given:

20.0 % of the initial values is left which means that 0.20 of $[A_0]$ is left. So,

$\frac {[A_t]}{[A_0]}$ = 0.20

t = 87.0 min

$\frac {[A_t]}{[A_0]}=e^{-k\times t}$

$0.20=e^{-k\times 87.0}$

4 0

4 years ago

Which images show a container holding a heterogeneous mixture?

marshall27 [118]

Answer:

Explanation:

a heterogeneous mixture is one that is not uniform in composition.It is made up of non-uniform mix of smaller constituent parts that could be separated from one another using various means.

4 0

3 years ago

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g At elevated temperatures, molecular hydrogen and molecular bromine react to partially form hydrogen bromide: H 2 (g) Br 2 (g)

oksano4ka [1.4K]

Answer: At equilibrium , there are 0.274 moles of $Br_2$