C. Diffusion is not a phase change.
I think the correct answer among the choices listed above is option B. Silicon oxide is the solid that contains two types of bonds because you have Si-Si bonds and Si-O bonds. That is two different covalent bonds. Hope this answers your question.
Answer:
5.1563867 × 10-9 miles
hope it helps
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A heterogeneous mixture since you can separate the ingredients that make it up.
