Question

The accepted value for the density of liquid mercury is 13.5336 g/mL. Four scientists measure the density of liquid mercury in their individual laboratories. The most accurate measurement is made by Dr. Chopra, who measures 13.487 g/mL. Dr. Thompson, who measures 13.5 g/mL. Dr. Smith, who measures 13.54 g/mL. Dr. Tyler, who measures 13.9336 g/mL.

Answer 1

The correct answer is C. Dr Smith, who measures 13.5 g/mL on e2020.

Answer 2

Answer: The most accurate measurement was made by Dr. Smith

Explanation:

The accepted value for the density of liquid mercury = 13.5336 g/mL

The most accurate measurement made by the scientists will be taken which has the minimum percentage error.

Formula o

$\%\text{ error}=\frac{\left|\text{Experimental value - Theoretical value}\right|}{\text{Theoretical value}}\times 100$

• By Dr. Chopra

Experimental value = 13.487 g/mL

$\%\text{ error}=\frac{\left|{13.487-13.5336}\right|}{13.5336}\times 100$

% error = 0.344%

• By Dr. Thompson

Experimental value = 13.5 g/mL

$\%\text{ error}=\frac{\left|{13.5-13.5336}\right|}{13.5336}\times 100$

% error = 0.248 %

• By Dr. Smith

Experimental value = 13.54 g/mL

$\%\text{ error}=\frac{\left|{13.54-13.5336}\right|}{13.5336}\times 100$

% error = 0.0472%

• By Dr. Tyler

Experimental value = 13.9336 g/mL

$\%\text{ error}=\frac{\left|{13.9336-13.5336}\right|}{13.5336}\times 100$

% error = 2.955 %

As, from the calculate percentage error. the % error by Dr. Smith is the least. Hence, the most accurate measurement for the density of liquid mercury will be 13.54 g/mL