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Which of the following is an element? a. o2 b. CaCl2 c. HPO4 d. CO2 (also i'm freshman in high school, idk why it's saying middle school)
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4 votes
Which of the following is an element?

a. o2
b. CaCl2
c. HPO4
d. CO2

(also i'm freshman in high school, idk why it's saying middle school)

User RogerTheShrubber
by
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2 Answers

3 votes
The answer I believe is A) o2
User Kanak Vaghela
by
7.6k points
6 votes
I am going to say a
User Krsto Jevtic
by
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