Which of the following best explains why arginine is more basic than lysine?

a. the electron-donating groups around the basic nitrogen on arginine make its conjugate base less stable.
b. the electron-donating groups around the basic nitrogen on arginine make its conjugate acid more stable.
c. the lack of electron-donating groups on lysine make its conjugate acid more stable.
d. the lack of electron-withdrawing groups on lysine make its conjugate base more stable.

B. The electron-donating groups around the basic nitrogen on arginine make its conjugate acid more stable.

Explanation:

The basic nature of a compound can be analized with the stability of its conjugate acid. The more stable the conjugate acid is, the more basic the substance is.

With that information in mind the answer is either B. or C.

Finally, in the structure of lysine we see that there are other electron donating groups (such as an amine or an imine), so the answer is option B.

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied