Chemistry true or false Explain why

Statement 3: When liquid water boils a physical change occurs creating water vapor not a chemical change which would create hydrogen gas and oxygen gas.

Explain why. Include in your response the difference between chemical bonds and intermolecular attractions.

the answer is c i believe

a:

by the combination of an unlimited number of elements

i'm pretty sure its b i might be wrong though!

consider the reaction below.

 no rx

at 500 k, the reaction is at equilibrium with the following concentrations.

[pci5]= 0.0095 m

[pci3] = 0.020

[ci2] = 0.020 m

what is the equilibrium constant for the given reaction?

0.042

0.42

2.4

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