Question 1
From the reactions below, what is ΔH for C(s) + ½O₂(g) → CO(g)?
(1) C(s) + O₂(g) → CO₂(g) ΔH = −393.5 kJ/mol
(2) CO(g) + ½O₂(g) → CO₂(g) ΔH = −283.0 kJ/mol
AP Chemistry pass rate and score distribution
In May 2025, 77.9% of AP Chemistry students scored 3 or higher. The mean score was 3.36 out of 5.
| Students in May 2025 | 168,833 |
|---|---|
| Scored 3 or higher | 77.9% |
| Scored 5 | 17.9% |
| Mean score | 3.36 |
The May 2025 distribution
- A 5: 17.9% (30,143 students)
- A 4: 28.6% (48,349 students)
- A 3: 31.4% (53,080 students)
- A 2: 15.9% (26,846 students)
- A 1: 6.2% (10,415 students)
What counts as passing
College Board does not call any score a pass. Many US colleges grant credit or advanced placement for scores of 3 and above, and each college decides which scores it accepts. Check the colleges on your list.
How a score is made
Section I and Section II are each half of the exam score, and College Board reports the result on the 1 to 5 scale. Our practice exams report questions right and points earned, never an AP score.
Try 2 questions
Question 2
The photoelectron spectrum of a neutral atom is shown. Peaks are listed from highest to lowest binding energy, and each bar's height is proportional to the number of electrons. Which element is it?
Next step
Questions people ask
What is the AP Chemistry pass rate?
77.9% of students scored 3 or higher in May 2025, the score many US colleges accept for credit.
What is the average AP Chemistry score?
3.36 in May 2025.
How many students take AP Chemistry?
168,833 students took the AP Chemistry exam in May 2025.