9
QuizMultiple Choice
Unit Test — Unit test
Question 9 • 2025-2026_MDCPS_2003345_Chemistry_1_A-CR
What is the percent by mass of oxygen in carbon dioxide (CO2)?Use .
Answer
A
27.29%B
57.12%C
72.71%D
79.99%Question 9 • 2025-2026_MDCPS_2003345_Chemistry_1_A-CR