A 54-gram sample of an unknown material has a volume equal to 20 20 cm 3. what is the identity of the substance?

Question

a.lead
b.steel***
c.aluminum
d.mercury

An ice cube, a glass of cold water, and a swimming pool are each exposed to the same amount of sunlight on a hot day. after five minutes, the ice cube is melted and the cold drink is two degrees warmer, but the tempature of the swimming pool remains unchanged. what is the best explanation for these observations.
A. The ice cube has a higher capacity than the glass of water
and pool***
B.The ice cube has a lower capacity than the glass of water and pool.
C. The ice cube and the glass of water have higher heat capacities than the swimming pool
d.The ice cube and the glass of water have lower heat capacities than the swimming pool

A banana turning brown when exposed to the air is an example of

A.a heterogeneous mixture.
B.vaporization
C.a chemical change***
D.an amorphous solid

Answer 1

anybody