Question

A teacher calculates the molar mass of sodium hydroxide as 37 g/mol. The true molar mass of sodium hydroxide is 40 g/mol. Find the teachers percent error

Answer 1

Solution : Teachers percent error is 7.5%

Percent error can be calculated by using the percent error formula.

`Percent error = (\left | Accepted value - Measured value \right |)/(Accepted value)* 100`

Accepted value is the true value.

Measured values is the calculated value.

In our question the True value (Accepted value) is given as 40 g/mol

Measured value (calculated value) is given as 37 g/mol

We will plug in the accepted value and measured value in the percent error formula and calculate the value of percent error.

`Percent error = (\left | Accepted value - Measured value \right |)/(Accepted value)* 100`

`Percent error = (\left | 40-37 \right |)/(40)* 100`

`Percent error = (3)/(40)* 100`

`Percent error = 0.075* 100`

Percent error = 7.5 %