For the reaction, B 2A, Kc = 2. Suppose 3.0 moles of A and 3.0 moles of B are introduced into a 2.00 L flask. In which direction will the reaction proceed to attain equilibrium? Will the concentration of B increase, decrease or remain the same as the system moves towards equilibrium? Solution:​

the catch is that the top numbers are atomic masses the bottom numbers are the numbers of protons and electrons in an uncharged atom. they are the number of that atoms as you would find them on the periodic table. further, the numbers on the left are used to determine the missing numbers on the right

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

It is 4.92 e-4 sorry if i am wrong

Cis the answer ur welcome if i get it wrong u don't have to me