At a certain elevated temperature, ammonia decomposes on the surface of tungsten metal as follows: The kinetic data are expressed as the variation of the half-life with the initial pressure of NH3: P/torr 11;2/s 264 456 130 228 59 102 16 60 (a) Determine the order of the reaction. (b) How does the order depend on the initial pressure

the maximum mass of nh3 is nh3 in grams

(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