1) The pressure of a sample of helium in a 1.0-L container is 0.857 atm. What is the new pressure if the sample is placed in a 0.5 -L container? Assume the temperature is constant.

◯  0.143 atm

◯  0.429 atm

◯  1.71 atm

◯  1.38 atm

Use the data to determine the likely identity for each element, and use evidence from both figures to support your claim.

1. "Element A is likely ______________ because _______________________________________________________________________________________________ _______________________________________________________________________________________________________________________________________

 

2. "Element B is likely ______________ because _______________________________________________________________________________________________ _______________________________________________________________________________________________________________________________________