The density of water is its mass divided by its volume. In this case, the mass of water was determined by subtracting the final mass of the glassware with water by the initial mass of the glassware without water. The volume was determined by observing closely which line (marked on the sides of each glassware) the water reached and reporting the most precise measurement. Based on the class data, the average densities of water and its standard deviations were: 50-mL beaker – avg: 0.90 g/mL, stand dev: 0.12, 10-mL graduated cylinder – avg: 0.980 g/mL, stand dev: 0.0600, 10-mL volumetric pipette– avg: 0.9800 g/mL, stand. dev: 0.06499, 50-mL burette– avg: 0.969 g/mL, stand. dev: 0.140. The average density of water compares our experimental value to the true value. This means that the closer our values are to the true density of water, which is approximately 0.998 g/mL at 18.89°C, the more accurate our data is. Furthermore, the standard deviation measures how precise our results are with one another. Based on the four data sets of the class, the most precise volumetric glassware is the 10-mL graduated cylinder because its standard deviation is the lowest. This lower value indicates that this glassware consistently yielded similar densities of water more often than other glassware. Although tied with the volumetric pipette, the graduated cylinder is also the most accurate volumetric glassware because the resulting average of its water densities is closest to the real density of

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