Balance the below chemical equation, include state of matter if missing. aAgCl(w) + bNi(x) > cNiCl3(y) + dAg(z)
1- What is a?
2- What is b?
3- What is c?
4- What is d?
w, x, y & z are states of matter.
5- What is w?
6- What is x?
7- What is y?
8- What is z?
9- Classify the reaction:

answer; 4 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