Answer:
4. [A] = 0.10M; [B] = 0.00M
Explanation:
Hello,
In this case, the following options are missing:
1. [A] = 0.00M; [B] = 0.10M
2. [A] = 0.0010M; [B] = 0.00010M
3. [A] = 0.10M; [B] = 0.10M
4. [A] = 0.10M; [B] = 0.00M
Therefore, since the equilibrium constant is small, one could make up that at the beginning there is no B since not too much A is consumed during the reaction, consequently, the answer is:
4. [A] = 0.10M; [B] = 0.00M
In fact, in this case would be 0.00001M which is the smallest one from the given options, considering:
Best regards.