Answer:
0.019 atm
Explanation:
Assume ideal gas, so PV/T is constant where P is pressure, V is volume and a product of radius R cubed and a constant C, T is the temperature
[tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}[/tex]
[tex]P_2 = P_1\frac{V_1}{V_2}\frac{T_2}{T_1}[/tex]
[tex]P_2 = P_1\frac{CR_1^3}{CR_2^3}\frac{T_2}{T_1}[/tex]
[tex]P_2 = P_1\left(\frac{R_1^3}{R_2^3}\right)^3\frac{T_2}{T_1}[/tex]
[tex]P_2 = 1\left(\frac{0.9}{3}\right)^3\frac{210}{298}[/tex]
[tex]P_2 = 0.3^3*0.7 = 0.019 atm[/tex]
