Consider RbOH → Rb+ + OH- and the following information.
AHlat = -765.01 kJ/mol
AHhydr of Rb+ = -315.2 kJ/mol
AHhydr of OH-=-532.7 kJ/mol
What is the AHsol rounded to the correct number of significant figures? Use A H sol = -A Hat + AHhydr-
-1.612.91 kJ/mol
-1,612.9 kJ/mol
-82.9 kJ/mol
-82.89 kJ/mol

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explanation:

answer; 4 electrons;

(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