Answer:Vrms is 149.7266 m/sec
Explanation:The root means square velocity of a gas can be calculated as follows:
Vrms =

where:
R is the ideal gas constant = 8.3145
T is absolute temperature = -55 + 273 = 118 degrees kelvin
M is the molar mass of the gas = 131.293 grams = 0.131293 kg
Substituting with these givens in the above equation, we would find that the Vrms is 149.7266 m/sec
Hope this helps :)
I really don’t know. Sorry
1. friction that’s all i know lol
The amount of substance at a certain time t, At, with half-life of h is determined by the equation,
At = (Ao)(0.5)^(t/h)
where Ao is the original amount.
From the given,
At/Ao = 0.45 = (0.5)^(t/432)
The value of t from the equation is 497.67 years.