Identify the true statements regarding the heme group of myoglobin and hemoglobin. the iron in the heme group can form six bonds. the fifth is with an imidazole ring of a histidine, and the sixth is with oxygen. the globin chains of myoglobin and hemoglobin prevent the oxidation of fe2+fe2+ to fe3+fe3+ , which irreversibly binds oxygen. the cooperativity of oxygen binding in hemoglobin arises from a shorter fe−o2fe−o2 bond length in the t state compared to the r state. a heme group contains four pyrrole rings, which are linked via methene (methine) bridges. the heme group is conjugated. myoglobin contains one heme group. the r state of hemoglobin has greater affinity for o2o2 than the t state because the iron atom is in the plane of the porphyrin ring.

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation:

he would use the colour black

(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