The reaction below proceeds spontaneously at 298 K. NH3(g) +Cl2(g)Right arrow. NH4Cl(s)

What is the sign of the entropy change, Delta. S?
Delta. S is negative because the product is less random than the reactants.
Delta. S is negative because the reactants are less random than the product.
Delta. S is positive because the product is less random than the reactants.
Delta. S is positive because the reactants are less random than the product.

ok whats the question if not i cannot you i need question and need a thing to answer

(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