A sample of helium gas is stored in a tank at 18 atm and 20°C. How do these conditions compare to the conditions of a gas at STP?

I uploaded the answer to a file hosting. Here's link:

tinyurl.com/wpazsebu

because of all the things that happen around the us, many people get into arguments which sadly could get physical, but we should actually make a change for that.

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

24