Answer;
= 553.28 mmHg
Step-by-step explanation;
According Boyle's the volume of a fixed mass of a gas is inversely proportional to pressure at constant temperature.
P1V1 =P2V2
P1 = 988 mmHg
V2 = 0.56 L
V2 = 1.0 L
P2 = ?
P2 = P1V1/V2
= (988 × 0.56)/1
= 553.28 mmHg