Match each set of energy sublevels to the principal energy level that contains them.

s sublevel
s and p sublevel
s, p, and d sublevel

third energy level
first energy level
second energy level

s sublevel : First energy level

s and p sublevel: Second energy level

s, p, and d sublevel: Third energy level

Explanation:

Principle Quantum Numbers : It describes the size of the orbital and the energy level. It is represented by n. Where, n = 1,2,3,4

Azimuthal Quantum Number : It describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1). For l = 0,1,2,3... the orbitals are s, p, d, f...

1. For n= 1, first energy level

n =1, l can have value 0 to (n-1) i.e. 0 only. Thus l can have only one value of zero which corresponds to s sublevel.

2. For n= 2, second energy level

n=2,  l can have value 0 to (n-1) i.e. 0 and 1 only. l= 0 corresponds to s sublevel and l= 1 corresponds to p sublevel.

3. For n= 3, third energy level

n=3,  l can have value 0 to (n-1) i.e. 0 ,1 and 2 only. l= 0 corresponds to s sublevel , l= 1 corresponds to p sublevel and l= 2 corresponds to d sublevel.

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.