Practice Quiz for Experiment 3 - Your quiz will contain questions similar to the ones below. Of course we will be changing the compounds so you need to know your nomenclature, dissociation rules, how to use the solubility rules and how to construct net ionic equations! Key will be posted two days before quiz. For each of the compounds below write the name and the net ionic representation (NIR). Acids are in aqueous solutions. Include (s), (aq) and (1) designations as needed in the NIR. NameNIRMn(I03)2SnCO3CuSO3HBrAg2CrO4 Co(CN)3HCNS Bi(OH)3Co(NO2)3

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.

(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