The quantum yield of light-induced chemical reactions (called photochemical reactions) measures the efficiency of the process. The quantum yield, ϕ, is defined as:
ϕ = number of reaction events number of photons absorbed.
Suppose a quantum yield for the reaction CH3X > CH3 + X is ϕ = 0.26. A cuvette containing a solution of CH3X is irradiated with 280-nm with a power of 885 mW for 10.0 minutes.
(A) Assuming total absorption of the light by the sample, what is the maximum amount (in moles) of CH3X that breaks apart?Express your answer to two significant figures.

1.9×10^20

Explanation:

ϕ = number of reaction events /number of photons absorbed

ϕ= 0.26

Energy= power× time

885×10^-3×10×60= 531J

But E= nhc/λ

n= number of photons

h= planks constant

c= speed of light

λ= wavelength

n= Eλ/hc

n= 531×280×10^-9/6.6×10^-34 ×3×10^8

n= 7.5×10^20

Therefore

From

ϕ = number of reaction events /number of photons absorbed

Number of reaction events= 0.26×7.5×10^20

= 1.95×10^20

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: