Answer:
a. Hydrogen
Step-by-step explanation:
They both contain two hydrogen atoms
Hydrogen peroxide: two hydrogen atoms (H2) and two oxygen atoms (O2)
Water: two hydrogen atoms (H2) and one oxygen atom (O)
Water molecules in the form of steam are moving very fast with large spaces between the molecules. Water and hydrogen peroxide are made of the same elements: oxygen and hydrogen. However, hydrogen peroxide (H2O2) has 1 more oxygen than water (H2O).
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