6.which two elements when combined,form water?
a.hydrogen and oxygen
b.hydrogen and nitrogen
c.sodium and oxygen
d.sulfur and oxygen
a.hydrogen and oxygen
b.hydrogen and nitrogen
c.sodium and oxygen
d.sulfur and oxygen
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Answer:
A. hydrogen and oxygen
Explanation:
When molecular hydrogen (H2) and oxygen (O2) are combined and allowed to react together, energy is released and the molecules of hydrogen and oxygen can combine to form either water or hydrogen peroxide.