Consider This Reaction: 8A(g) + 5B(g) $\rightarrow$ 8C(g) + 6D(g) If [C] Is Increasing at the Rate

Multiple Choice

Consider this reaction: 8A(g) + 5B(g) $\rightarrow$ 8C(g) + 6D(g) If [C] is increasing at the rate of 4.0 mol L¯¹s¯¹, at what rate is [B] changing?

A) -0.40 mol L¯¹s¯¹
B) -2.5 mol L¯¹s¯¹
C) -4.0 mol L¯¹s¯¹
D) -6.4 mol L¯¹s¯¹
E) None of these choices is correct, since its rate of change must be positive.