Fe + Cl2  Fe FeCl3 2. Al + O2 Al2O3
3. Fe3O4 + H2 Fe + H2O
4. P2O5 + H2O  H3PO4
5. Al(OH)3  Al2O3 + H2O
6.Ba(OH)2 + HCl  BaCl2 + H2O
7. Zn + Fe(NO3)3 Zn(NO3)2 + Fe
8. C3H6 + O2  CO2 + H2O
9.Ba(OH)2 + AlCl3  Al(OH)3 + BaCl2
10.Mg + Al2(SO4)3 MgSO4+ Al

(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