Juan is doing a chemistry experiment that produces oxygen gas.

He estimates that 15L of gas will be produced.

The actual amount of gas produced is 13L.

Calculate the percentage error in his estimate.

To calculate the percentage error in Juan's estimate, you can use the following formula:

\[
\text{Percentage Error} = \left( \frac{|\text{Estimated Value} - \text{Actual Value}|}{\text{Actual Value}} \right) \times 100
\]

Plugging in the values:

\[
\text{Percentage Error} = \left( \frac{|15\, \text{L} - 13\, \text{L}|}{13\, \text{L}} \right) \times 100
\]

\[
\text{Percentage Error} = \left( \frac{2\, \text{L}}{13\, \text{L}} \right) \times 100 \approx 15.38\%
\]

So, the percentage error in Juan's estimate is approximately **15.38%**.

Would you like any details or have any questions? Here are 5 related questions you might consider:

1. What is the formula for calculating percentage error?
2. Why is it important to calculate percentage error in experiments?
3. How does percentage error affect the interpretation of experimental results?
4. Can percentage error be negative?
5. What are some common sources of error in chemistry experiments?

**Tip:** Always report percentage error to an appropriate number of significant figures based on the precision of your measurements.

Calculate the percentage error in Juan's estimate for the amount of oxygen gas produced in his chemistry experiment. Learn how to apply the percentage error formula step-by-step with an example. Suitable for Grades 9-12.

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