Answer:
Partial pressure of CO2 = 16 atm
Explanation:
Total number of moles of gases = 4+1 = 5 moles
Mole fraction of CO2 = 4/5
Partial pressure of CO2 = mole fraction of CO2 × total pressure
Partial pressure of CO2 = (4/5) × 20
Partial pressure of CO2 = 16 atm
Yes it could, but you'd have to set up the process very carefully.
I see two major challenges right away:
1). Displacement of water would not be a wise method, since rock salt
is soluble (dissolves) in water. So as soon as you start lowering it into
your graduated cylinder full of water, its volume would immediately start
to decrease. If you lowered it slowly enough, you might even measure
a volume close to zero, and when you pulled the string back out of the
water, there might be nothing left on the end of it.
So you would have to choose some other fluid besides water ... one in
which rock salt doesn't dissolve. I don't know right now what that could
be. You'd have to shop around and find one.
2). Whatever fluid you did choose, it would also have to be less dense
than rock salt. If it's more dense, then the rock salt just floats in it, and
never goes all the way under. If that happens, then you have a tough
time measuring the total volume of the lump.
So the displacement method could perhaps be used, in principle, but
it would not be easy.
Answer:
Volume of acetone = 257.4 mL
Explanation:
Density = mass / volume
Density Hg = Mass Hg / Volume Hg
13.59 g/mL = Mass Hg / 15 mL Hg
13.59 g/mL . 15 mL = Mass Hg → 203.85 g
This is the mass of acetone
Density acetone = Mass acetone / Volume acetone
0.792 g/mL = 203.85 g / Volume of acetone
Volume of acetone = 203.85 g / 0.792 g/mL
Volume of acetone = 257.4 mL
Answer:
The answer to your question is letter A. Oxygen, Fluorine, Neon
Explanation:
Data
Elements of the 2nd period
A. The three elements of this list are found in the second period.
B. The three elements of this list are found in the third period
C. One element of this list is in the 2nd period, another in the third and the last one in the fourth period.
D. The elements of this list are found in the second group but not only Beryllium is found in the 2nd period.
