Answer all parts (0) in the recovery of iron from iron ore, the reduction of the ore is actually accomplished by reactions involving carbon monoxide. using the following thermodynamical equations fe3o4 (s) + co (g) â 3 feo (s) + co2 (g) ahâ°+38 kj 3fe2o3 (s) +co (g) â 2fe3o4 (s) + co2 (g) ahâ°=-59kj fe2o3 (s) + 3c0 (9) ⺠2fe (s) + 3co2 (9) ahá»=-28kj (a) calculate ah⺠for the reaction: feo (s) + co (9) ⺠fe (s) + co2 (g) [10 marks] (b) if the as for the reaction is -23.6 j/mol calculate the ag value at 200â°c. [5 marks] (c) is the reaction spontaneous at 200â°c? explain your answer. [5 marks]

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.

it takes on an electronical 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