An “instant cold pack” contains water and an inner pouch with 47.2 g of KNOZ. When the inner pouch is
broken and all of the KNO, is completely dissolved in water, the dissolving process absorbs 16.3 kJ of energy
(which "feels cold”). Calculate molar heat of solution (AHº) for this process in kJ/mol of KNO,.
" include correct sig figs, units, AND correct + or - sign "

precipitation

explanation:

when it goes from cloud to rain/back to earth in the form of rain

(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