4. Zinc oxide is reduced by heating it with carbon.
ZnO + C->Zn + CO
How does this equation show that zinc oxide is reduced?

there are no statements provided but here is why:

sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

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no, the red giant is the hottest with 2.00.000.000 degrees celsius. while the white dwarf only 25,000 degrees celsius.