Melting butter is a physical change. The statement that best describes what is happening is that the butter contains a new arrangement of atoms.
2 NH3 -> 1 N2 + 3 H2
Explanation:
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Through hemoglobin transport in blood, material exchange is carried out on the alveolar membrane.
When atoms bond together to form molecules, they share or give electrons. If the electrons are shared equally by the atoms, then there is no resulting charge and the molecule is nonpolar.
