Concentration of the reactant,pressure,surface
area of the reactant and temperatur
Answer:
K= 25.16%
Mn= 34.59%
O= 40.25%
Explanation:

Find the total mass of the compound. You can do this by multiplying by the molar mass.

add them:
40+55+64=159g
Now convert each element individually to grams using molar mass



Divide by the mass of the compound and multiply by 100



Answer : Option D) Step A has a greater activation energy, so it is slower than Step B.
Explanation : Here we can clearly see that when the reactants undergo step A and then forms an intermediate which goes to step B and then finally yielding products. This both the steps undergo an endothermic reaction as the energy of reactants is lower than that of products. Also we can compare the energy of activation of step A with step B and see that energy of activation of step A is higher than step B. So, step A is much slower than step B.