An adult inhales about 6.0 x 10⁻⁴ m³ of fresh air during a breath. only 20% of fresh air is oxygen. assume the pressure in the lungs is 1.0 x 10⁵ pa and the air is at a temperature of 300 k.
how many oxygen molecules are in each breath?
a. 1.4 x 10²³
b. 2.9 x 10²¹
c. 4.9 x 10⁻⁴
d. 2.9 x 10²⁵

B.

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at NTP, weighs equal to the molecular mass and contains avogadro's number of particles.

Given : Volume of fresh air =

volume of oxygen  =

According to the ideal gas equation:

P = Pressure of the gas =  = 0.98 atm

V= Volume of the gas =  

T= Temperature of the gas = 300 K      

R= Gas constant = 0.0821 atmL/K mol

n=  moles of gas= ?

1 mole of oxygen contains = molecules

Thus  of oxygen contain= molecules of oxygen  

Thus there are oxygen molecules in each breath

it would be rhyolitic hope this

ans.

gregor john mendel is known for study of inheritance in pea plants. he used garden pea plant for his study, having alternative traits for various characters. he performed cross-breeding in pea plants to check how characters are transmitted between parents to offspring, such as cross between pure tall and pure dwarf plant. mendel studied the inheritance patterns in pea plants for various generations.

thus, the correct answer includes options and f).