Agas initially at stp is changed to 248 k. calculate the final pressure of the gas.

The final pressure of the gas at 248 K is 0.908 atm

Explanation:

              At standard temperature and pressure, temperature of 0 Celsius and pressure which is equal to the atmosphere, 1 atm.

= 0 Celsius

= 1 atm

Change in temperature causes a change in the pressure:  

                          =248K

                          =?

Calculating the pressure,   using the Gay-Lusaac's law:  

Convert the temperatures from Celsius to Kelvin:

                        =0 Celsius+273=273K

                        =248K

To find  :

  = = 0.908 atm

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.

the answer is option a.