Answer:
The new pressure will be 0.225 kPa.
Explanation:
Applying combined gas law:

where,
are initial pressure and volume at initial temperature
.
are final pressure and volume at initial temperature
.
We are given:



Putting values in above equation, we get:


Hence, the new pressure will be 0.225 kPa.
Explanation is in a file
bit.
ly/3a8Nt8n
The density is mass divided by volume
D. Phosphorus
You can tell what elements have how many valence electrons by what group they're in. Groups are vertical.
So group 1 has 1 valence electron
Group 2 has 2 valence electrons
Group 3 has 3 valence electrons, etc.