The formula is m = D x V
D = <span>13.69 g/cm^3.
</span>V = <span>15.0 cm^3
the mass of the liquid mercury is m= </span>13.69 g/cm^3 x 15.0 cm^3 = 195g
the molar mass of Hg is 200,
1 mole of Hg = 200g Hg, so #mole of Hg= 195 / 200 = 0.97 mol
but we know that
1 mole = 6.022 E23 atoms
0.97 mole=?
6.022 E23 atoms x 0.97 / 1 mole = 5.84 E23 atoms
I'm pretty sure the answer is
<span>A) radon, neon, calcium </span>
The density of a liquid is the ratio of its mass to its volume. It is an extensive property even though mass and volume are both intensive properties. At a certain temperature and pressure, the density of a liquid is constant. The solution is as follows:
Density = Mass of liquid/Volume of liquid
Mass of liquid = Mass of liquid and cylinder - Mass of cylinder
Mass of liquid = 12 g - 10.8 g = 1.2 g
Density = 1.2 g/7.4 mL
Density = 0.162 g/mL
The substance with the highest mass is botulinum toxin
Answer:
a) Pex = 15 bar
b) work = 3000 J
Explanation:
<u>Step 1: </u>Data given
Volume of the gas = 2.5 dm³
Pressure of the gas = 3.00 bar
The gas is compressed at a constant pressure pex , so that the final volume is 0.5 dm³
The final temperature is the same as in the beginning.
<u>Step 2:</u> Calculate Pex
If the gas is compressed isothermally ( =constant temperature), then via the ideal gas law we can write:
P2 =Pex = (P1*V1)/V2
Pex = (3 * 2.5)/0.5
Pex = 15 bar
<u>Step 3:</u> Calculate the work
If Pex is constant, then is:
w = −
∫Pex *dV = -Pex *ΔV = -15 *(0.5-2.5)dm³ = 30dm³ bar
30dm³ bar * 10^5 Pa
/bar * 0.1³ m³/dm³ =3000 kg*m²/s² = 3000 J