Question

1. Helium takes up 4.71 liters at constant temperature and 200 mmHg. What is the volume of the same helium at 800 mmHg? 

Answer 1

We use the relation

$P_1V_1=P_2V_2$

$Than \\ 200×4.71=800×V_2$

$\boxed{V_2=1.1775L}$ answer