Question

The mass of a watch glass was measured four times. The masses were
99.997 g, 100.008 g, 100.011 g, and 100.005 g. What is the average
mass of the watch glass?

Answer 1

Answer:

$\large \boxed{\text{100.005 g}}$

Explanation:

$\text{Average mass} = \dfrac{\text{Sum of all measurements}}{\text{Number of measurements}}$

1. Sum of Measurements

$\begin{array}{cr}\textbf{No.}& \textbf{Mass/g} \\1& 99.997 \\2& 100.008 \\3& 100.011 \\4& 100.005 \\\text{Sum } = & \mathbf{400.021}\\\end{array}$

2. Average mass

$\text{Average mass} = \dfrac{\text{400.021 g}}{4} = \textbf{100.005 g}\\\\\text{The average mass of the watch glass is \large \boxed{\textbf{100.005 g}} }$

Answer 2

The average mass of the watch glass is 100.005g.

Given that,

• The masses were  99.997 g, 100.008 g, 100.011 g, and 100.005 g.
• It should be determined four times.

Now the average mass of the watch glass should be

$= \frac{99.997 g + 100.008 g + 100.011 g + 100.005 g}{4}\\\\= \frac{400.021}{4}$

= 100.005 g

Therefore we can conclude that the average mass of the watch glass is 100.005g.

Learn more about the mass here: brainly.com/question/19694949