5. An element exists as 2 different isotopes. The first isotope has a mass number of 107 with a percent abundance of 51.853%, and the second isotope has a mass of 109 with an abundance of 48.147%.
What is the average atomic mass of this element? Then, determine the element name.
(Ans = 108.0 amu, Silver)
6. Calculate the average atomic mass of the element Hydrogen (H) using the following data:
Hydrogen-1 99.0%
Hydrogen-2 0.80%
Hydrogen-3 0.20%
(Ans = 1.0 amu)

i believe it is 40–40–20%

explanation:

(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