Your answer is d hope I helped
Hello!
You need to calculate the volume of the container. To calculate the volume of this amount of N₂ gas we need to make the assumption that N₂ behaves like an
ideal gas.
1 mole of an ideal gas under Standard Temperature and Pressure occupies
22,4 L so the calculations are as follows:

So, the volume of the container should be
1,028 L or more.
Have a nice day!
Volume = 0.50 L
Molar mass KBr = 119.002 g/mol
Molarity = 0.125 M
Mass ( KBr) = ?
mass = molarity * molar mass * volume
mass = 0.125 * 119.002 * 0.50
mass = 7.437625 g of KBr
hope this helps!