The acceptable range for a test method is the mean +2s. After five runs with no controls outside of acceptable limits, subsequent control values fell below the mean -2s. What does this information indicate?

Beer’s law defines a linear relationship between concentration and what measurement?

What is the median of the following set of nine sample values? 15, 16, 18, 18, 20, 20, 22, 22, 22, 23, 27, 27

A four-fold serial dilution is performed. What is dilution of tube 3?

Which is the point where axes meet (0,0) on a Cartesian graph?

What is the final concentration if 12 mL of 1 molar salt is brought to 50 mL?

A dissolving or diluting agent

What volume of 0.5% HCl can be prepared from 2.5 g of HCl?

What is the concentration of a mixture of 100 mL 25% glucose plus 20 mL of 2.5% glucose?

How much 2 N HCl is required to make 25 mL of 0.8 N HCl?