5) After performing a routine laboratory synthesis, a chemist was left with more waste product than desired. She wanted to check the pH of the substance to properly dispose
of the waste, but her pH meter was broken, and the lab had run out of litmus paper.
However, she knew that based on her calculations, the solution likely had a hydrogen
ion, H, concentration of 8.7 x 10-5 M. What is the pH of this solution ? Choose the range
of pH values that contains the correct pH.
A) 1-3.9
B) 4-7.9
C) 8-11.9
D) 12-14

it is stable as it is in group 0 which have full outer shells of electrons

(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

0.88m hope i am correct : )