Table 5 shows the student's results for the experiment with hydrochloric acid of a lower concentration. Calculate mean value X in Table 5. Do not include the anomalous result in your calculation. Give your answer to 2 significant figures.

To calculate the mean value X, we first need to identify the anomalous result in the row for 40 seconds. The values are 46, 30, 47, and 49. The value 30 is significantly different from the other three, so it is the anomaly and should be excluded from the calculation. We then calculate the mean of the remaining (concordant) results: Mean = (46 + 47 + 49) / 3 Mean = 142 / 3 Mean = 47.333... cm³ The question asks for the answer to 2 significant figures. The first two significant figures are 4 and 7. The next digit is 3, which is less than 5, so we round down. Mean value X = 47 cm³.