Verified Answer :

nicky129

The answer is B since it's a second order reaction.

Presumably, you meant to write:


rate = k[a][b] ---- square brackets are used, by convention, to indicate the concentration of a species.


The


The rate gives the rate of change in concentration of the product per unit time, so is going to have units of concentration per unit time, e.g., mol/(Ls) or mol/(kg solvent s). [a] and [b] both have units of concentration, i.e., M = molarity = mol/liter, or m = molality = mol/(kg solvent). The answer choices you gave used a lower-case "m" so I'll assume that meant molality


Putting this together yields:


m/s = km²


k = m/s 1/m² = 1/(ms) = m^-1 s^-1




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