Final answer:
The percent error for the melting point of a substance with an experimental value of 73.0 °C and an accepted value of 61.0 °C is 19.67%.
Step-by-step explanation:
The percent error for an experimentally obtained value is calculated by taking the absolute value of the difference between the experimental value and the accepted value, dividing it by the accepted value, and then multiplying by 100%. Here, the accepted value of a substance's melting point is 61.0 °C and the experimental value is 73.0 °C. By applying the formula PE = (|accepted value - experimental value| / accepted value) x 100%, we can calculate the percent error for the melting point.
Substituting the values we have:
PE = (|61.0 °C - 73.0 °C| / 61.0 °C) x 100%
= (| -12.0 °C| / 61.0 °C) x 100%
= (12.0 °C / 61.0 °C) x 100%
= 0.1967 x 100%
= 19.67%
Therefore, the percent error for this experimental melting point is 19.67%.