The Ratio of Substance X to Substance Y in a Solution

Multiple Choice

The ratio of substance X to substance Y in a solution is measured in two separate trials.The concentrations,ratios of X/Y,and log(X/Y) are presented in this table. $\begin{array}{|c|c|c|c|c|}\hline \text { Trial } & \begin{array}{c}\text { Concentratio } \\\mathbf{n ~ o f ~ X ~}\end{array} & \begin{array}{c}\text { Concentratio } \\\mathbf{n} \text { of Y }\end{array} & \text { Ratio X/Y } & \log (\mathbf{X} / \mathbf{Y}) \\\hline 1 & 20 & 10 & 2 & 0.301 \\\hline 2 & 10 & 20 & 0.5 & ? \\\hline\end{array}$
What is the log of X/Y from trial 2?

A) 0.301
B) -0.301
C) 3.01
D) -3.01