When you decrease the diameter of the stationary phase particles and make them more uniform, in HPLC, which term or terms of the van Deemter Equation is or are minimized?

C-term

Explanation:

A correlation between plate height and mobile phase velocity is known as the van Deemter equation.

Where;

H is the plate height

A  is the eddy diffusion term

B is the longitudinal diffusion term

C is the resistance to mass transfer coefficient

u is the linear velocity

Here C-term describes the mass transfer of sample components between the stationary phase and the mobile phase during separation. One of the major factor affecting C-term is the particle size, changing the diameter equally changes the particle size.

The answer is C-term

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

pie chart because it is in percents ( % )