Which statement about the energy of a phase change is true?
a. melting is an endothermic change, because ice releases energy to its surroundings as it melts.
b. melting is an endothermic change, because ice absorbs energy from its surroundings as it melts.
c. melting is an exothermic change, because ice absorbs energy from its surroundings as it melts.
d. melting is an exothermic change, because ice releases energy to its surroundings as it melts.

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

Which best explains why an iceberg floats?

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same