11. Classify each of the following chemical reactions as a combination, decomposition, single replacement, double replacement, or combustion reaction:
Type of reaction
Equation of the chemical reaction
CuO(s) + 2HCl(aq) —— CuCl2(aq) + H20(1)
2A1303(s) => 4Al(s) + 302(8)
De composition
BaCl2(aq) + K2CO3(ad) —→ BaCO3(s) + 2Cl(aq)
Pb(s) + O2(8) -PbOz(s)
C3H2(g) + 702() =5CO2(g) + 4H20(3)
Zn(s) + CuCl2(aq) + Cu(s) + ZnCl2(aq)
Combustion

can you attach a picture of the lettuce? : )

you need to stop taking that class

(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