Which of the following has the lowest % oxygen composition?
A) N2O
B) Al2O3
C) K2CO3
D) KMnO4
Correct Answer:
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Q63: A chromium-silicon compound contains 73.52% chromium. The
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Q65: Which contains the least % of oxygen?
A)H2O2
B)Na2O2
C)HgO
D)CO2
Q66: Which contains the highest % of hydrogen?
A)HCl
B)H2SO4
C)H3PO4
D)H2O
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