Answer:
204.5 molecules
Explanation:
Pressure, P = 1.01 x 10^-13 Pa
Volume, V = 9.28 cm^3 = 9.28 x 10^-6 m^3
Temperature, T = 332 K
Gas constant, R = 8.314 in MKS system
Let n be the number of moles
Use ideal gas equation
P x V = n x R x T
1.01 x 10^-13 x 9.28 x 10^-6 = n x 8.314 x 332
n = 3.396 x 10^-22
According to the Avagadro's law
1 mole of the substance contains = 6.023 x 10^23 molecules
so, 3.396 x 10^-22 moles contains = 6.023 x 10^23 x 3.396 x 10^-22
= 204.5 molecules
Answer:
5.704 x 10⁻² V
Explanation:
given,
thickness of membrane, d = 8 nm = 8 x 10⁻⁹ m
Electric field strength, E = 7.13 MV/m
= 7.13 x 10⁶ V/m
The electric potential across membrane
V = E d
V = 7.13 x 10⁶ x 8 x 10⁻⁹
V = 57.04 x 10⁻³
V = 5.704 x 10⁻² V
the electric potential across an membrane is equal to 5.704 x 10⁻² V
Explanation:
Energy is involved in changes of state because the energy of particles of matter determines the matter's state.
Changes of state are physical changes in matter.
Energy must be absorbed to change a liquid to a gas.
Sublimation is solid to gas (no liquid involved).
1 D
2 False
3 True
4 D
I’d say a stronger force because the moon doesn’t float away. But I’m
Not a scientist lol