A&D Quiz
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2 questions
[Deleted Account]
•over 6 years agoQuestion 1
Multiple Choice
1 point
how much oxygen is in the air we breathe (more or less)
A.15%
B.21%
C.34%
D.48%
Question 2
Multiple Choice
1 point
What is sodium chloride
A.Salt
B.S8Cl2
C.
D.