A student has measured the density of their metal cylinder as 9.06 g/cm^3. Their

Question

A student has measured the density of their metal cylinder as 9.06 g/cm^3. Their instructor informs them that the known density of copper is g/cm^3. What is the percent error in their measurement? Calculate the mass of zinc metal used in the reaction given the following experimental data. Calculate the mass percent of sodium chloride in an unknown brine solution using the following calibration data if the density of the unknown solution is 1.07 g/mL. (You may use the excel data or the paper method to get your answer)

Explanation / Answer

Given

Density measured by student = 9.06 g/cm3

Known Density of copper = 8.96 g/cm3

% error = (Measured - Known)/Known * 100 %= (9.06 - 8.96)/8.96 * 100 % = 1.12 %

Given

Mass of Beaker, empty = 53.271 g

Mass of Beaker and zinc = 54.151 g

Mass of Zinc = 54.151 -53.271 = 0.88 g Answer

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