Consider the following overall reaction and its rate law: 2 a + b  2 c, rate = k [a][b]. which of the following mechanisms can be considered a possible mechanism for the reaction? i: 2 a + b  2 c (one step)ii: a + b ⇄ m (slow) iii: a + b ⇄ m (fast) m+ a  2 c (fast) m+ a  2 c (slow)a) only ib) only iic) i and iiid) ii and iiie) i, ii, and iii

i don t now

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer