What will happen to the volume if the number of moles of a gas is decreased at constant temperature and pressure? the volume will increase. the volume will decrease. the volume will remain the same. the volume will be negative.

The volume will decrease.

Explanation:

The number of moles of a gas is directly proportional to its volume according to Avogadro's law. Hence volume increases as number of moles increases. Volume also decreases as number of moles decreases.

Hence according to the question, when the number of moles of a gas decreases, the volume of the gas also decreases along side in obedience to the Avogadro's law.

(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