Respuesta :

ni420

Answer:

2.33 atm

Explanation:

using gas equation,PV=nRT

here V volume is constant and n&R is also constant

now clearly we can state that

Pressure is directly proportional to temperature

now,temperature changes from 90°C to 30°C

i.e, becomes one third of original

since it's pressure is directly proportional,therefore it will also became ,one third of original

i.e, 1/3 × 7.0 atm

=7/3 atm

=2.33 atm