Chemistry Homework Help

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Standard Deviation, Mean, Median & Mode

#### Q. An irregular solid with a mass of 25.9863 ± 0.0003 g displaces 20.5 ± 0.2 mL of water. Calculate the density of the solid.

Solved • Sep 23, 2019

Standard Deviation, Mean, Median & Mode

#### Q. The density of a solution is determined using a class A 25-mL volumetric flask and an analytical balance. If the mass of the empty volumetric flask is 26.9872 ± 0.0003 g, the mass of the flask filled with solution is 53.9820 ± 0.0003 g, and the tolerance for the flask is ± 0.03 mL, what is the density of the solution? (the answer is supposed to be D but I don't know why..)

Solved • Sep 23, 2019

Standard Deviation, Mean, Median & Mode

#### Q. A mass of approximately 10 grams is measured using weight by difference. If a vial containing calcium carbonate powder has an initial mass of 87.36 ± 0.03 g and a final mass of 76.99 ± 0.03 g, what mass of calcium carbonate was taken?

Solved • Sep 23, 2019

Standard Deviation, Mean, Median & Mode

#### Q. Calculate the mean percentage error from the final columns of tables 1 through 3. please show work step by step

Solved • May 29, 2019