Next Step 3 Chem/Phys

Question 1

Pulmonary surfactant does what?

Answer 1

Decrease surface tension and this decreases the pressure difference required to inflate the airway.

Question 2

What is the Gibbs free energy equation?

Answer 2

Change G= Change H - T • change S

Question 3

What are the azimuthal quantum number for a Beryllium atom for a Boron?

Answer 3

Being that Be is 1s2, 2s2 making it a s-type orbital the quantum number is l=0 and Boron being configuration 1s2, 2s2, 2p1 making it a p-type orbital the quantum number is l=1

Question 4

The high-energy radiation produced by gamma rays has sufficient energy to?

Answer 4

Generate free radicals, excite electrons to higher energy levels, and eject electrons from molecular orbitals.

Question 5

Which hybridize orbital electrons are the hardest to remove?

Answer 5

The hardest to remove would be sp- hybridized due to the their higher S character pulling the electrons closest to the nucleus.

Question 6

A person pushes horizontally on a 50-kg crate, causing it to the accelerate from rest and slide across the surface. If the push causes the crate to accelerate at 2.0m/s^2, what is the velocity of the crate after the person has pushed the crate a distance of 6 meters?

Answer 6

Vf^2= Vi^2+2ad

Vf^2=0^2+ 2•2•6

Vf^2= 24

V= 5 approx

Question 7

Alkali metals have the largest what?

Answer 7

Alkali metals have the largest atomic radii of the periodic table