The new volume : 0.07 L
<h3>
Further explanation</h3>
Boyle's Law
At a constant temperature, the gas volume is inversely proportional to the pressure applied

P₁=1 atm
V₁=0.39 L
P₂=5.6 atm

To find pH, use the following formula ---> pH= - log [H+]
so first we need to calculate the [H+] concentration using the OH concentration. to do this, we need to use this formula--> 1.0x10-14= [H+] X [OH-], so we solve for H+ and plug in
[H+]= 1.0X10-14/[OH-]---> 1.0 x 10-14/ 1.0 x 10-4= 1.0 x 10-10
now that we have the H+ concentration, we can solve of pH
pH= -log (1.0x10-10)= 10
answer is A
Answer:
See below
Explanation:
Each metal oxide reacts with HCl to form water and the metal chloride

The answer is D . I hope this help you :) .