Question

Carmen completed an experiment in her chemistry class with a 17% error. She calculated percent error using the formula below, where "Experimental" is Carmen's result from the experiment and "Accepted" is the textbook result.

Percent Error =
Experimental - Accepted

Accepted
× 100%

If the "Accepted" value for this experiment is 4.9 grams, which of the following could be Carmen's result for this experiment? Round to the nearest tenth, if necessary.

Answer 1

Step-by-step explanation:

Let the experimental value be x

$percent \: error \\ = \frac{experimental - accepted}{accepted} \times 100 \\ \\ 17 = \frac{(x - 4 .9)}{4.9} \times 100 \\ 17 \times 4.9 = 100x - 490 \\ 83.3 + 490 = 100x \\ 100x = 573.3 \\ x = \frac{573.3}{100} \\ x = 5.733 \\ x \approx \: 5.7$

Hence, experimental value is 5.7 grams.

Answer 2

Answer:

5.7

Step-by-step explanation:

E: Experimental

(E - 4.9)/4.9 × 100 = 17

E - 4.9 = 17 × 4.9/100

E - 4.9 = 0.833

E = 0.833 + 4.9

E = 5.733

5.7 to the nearest tenth