Two glass vessels M and N are connected by a closed valve. M
i
N
M contains helium at 20°C at a pressure of 1* 10 Pa N has been evacuated, and has three
times the volume of M. In an experiment, the valve is opened and the temperature of the whole
apparatus is raised to 100°C
What is the final pressure in the system?
A
3.18 10Pa
B
4.24 10'Pa
C 1.25 X 10 Pa
D 5.09 10 Pa

N has been evacuated, and has three times the volume of M. In an experiment, the ... of the whole apparatus is raised to 100°C. What is the final pressure in the system? A B C D 3.18 x 10* Pa 4.24 x 10* Pa 1.25 x 10Pa 5.09 x 10Pa. ... are connected by a closed valve MEN M contains helium at 20°C at a pressure of 1 10Pa.

Explanation:

tracks, burrows, eggshells, nests, tooth marks, or gastroliths

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.