Q. Write true or false.
1.The chemical formula of calcium chloride is CaCl2___.
2.H2O is formed by two atom of hydrogen and two atoms of oxygen___.
3.About 21% of air by volume is oxygen___.
Answers
Answered by
2
Answer:
- T
- F
- T
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Answered by
1
Answer:
true
false as the water is formed by two aroma of hydrogen and one atom of oxygen
true
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