Answer:
In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.
Since temperature is constant we use Charles law which relate temperature and volume
therefore From Charles law equation that is T1/v1=T2/V2
T1=80k
V1=3.1L
T2=22+273=295k
V2=?
80k/3.1L=295k/V2
by cross multiplication
V2=(3.1L x295k)/80k=11.43L
a. P=0.971 atm=737.6 mmHg
b. n=2.88 x 10⁻³
<h3>Further explanation
</h3>
Dalton's law of partial pressures states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the component gases
A. vapor pressure of water at 22.5 = 20.4 mmHg
Pt=P H₂ + P H₂O
758 = P H₂ + 20.4
P H₂=737.6 mmHg=0.971 atm
B.Ideal gas Law = PV=nRT
P = 0.971 atm
V = 72 ml = 0.072 L
R = 0.082 L/atm mol
T = 22.5 + 273.15 =295.65