1.Rusting of iron nail is a example of a change of phase?

1.Rusting of iron nail is a example of a change of phase? T or F
2.Which
of the following amounts is the closest to the molar mass C18H25N0?
1.30lb
1.9419 kg
128.44 g
200g
3.Occasionally an asteroid will break into fragments due to a collision. These fragments, which often contain ice. can leave asteroid belt and even make their way to Earth. Upon entering the earth’s atmosphere, such a fragment is heated to high temp by frictional forces. Ice contained within a fragment typically liquefies or vaporizes. This type of change is considered a chemical change? T or F

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