Refer to the approach we used in solving problems in Lesson 8b, to answer the following question. Airbags in cars inflate when a sample of sodium azide (NaN3) in the airbag decomposes rapidly during an accident. The decomposition is represented by the following unbalanced equation: NaN3(s)→ Na(s)+N2(g) Note: (s) means solid and (g) means gas and they do not affect any calculations The nitrogen gas produced in this reaction fills up the bag to protect the car’s occupants. In their design of a car, if the engineers decided to fill the airbag with 50g of sodium azide (NaN3), what mass of nitrogen gas (N2) will be produced? Hint: balance the chemical equation before using it for any calculation.

the answer is d : ) have a good da

wher is the rest of the question

(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