Answer : The total pressure in the flask is 1.86 atm.
Explanation :
First we have to calculate the pressure of
gas.
Using ideal gas equation :

where,
P = Pressure of
gas = ?
V = Volume of
gas = 765 mL = 0.765 L (1 L = 1000 mL)
n = number of moles
w = mass of
gas = 1.25 g
M = molar mass of
gas = 44 g/mol
R = Gas constant = 
T = Temperature of
gas = 
Putting values in above equation, we get:


Now we have to calculate the total pressure in the flask.

Given :


conversion used : (1 atm = 760 mmHg)
Now put all the given values in the above expression, we get:

Therefore, the total pressure in the flask is 1.86 atm.
Ideal gases are hypothetical gases whose molecules occupy negligible space and have no interactions, and that consequently obeys the gas laws exactly.
Not exactly sure about the amount...
I hope this helps! :)
The only answer that really makes sense here is the first one, properties. I would go with that one.