What does the pattern in the image above represent? OA. the phases of the Moon
OB. the patterns of the stars
OC. the seasons of the year
OD. the cycle of the Sun

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

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Which statement justifies that hydrogen peroxide (h2o2) is a polar molecule? the o – h bond is nonpolar and the molecule is asymmetric. the o – h bond is nonpolar and the molecule is symmetric. the o – h bond is polar and the molecule is asymmetric. the o – h bond is polar and the molecule is symmetric.