Iwhat is the mass of 1 mole of magnesium (mg)? express you answer to four significant figures

the answer would be a

i'm assuming that the correct answer is indeed the first one/ "a"..

b. is the answer hoped i        

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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