Gravitational potential energy is energy an object possesses because of its position in a gravitational field. The most common use of gravitational potential energy is for an object near the surface of the Earth where the gravitational acceleration can be assumed to be constant at about 9.8 m/s2.
Chemical reaction: 2PCl₃ + O₂ → 2POCl₃.
m(PCl₃) = 194 g.
n(PCl₃) = m(PCl₃) ÷ M(PCl₃).
n(PCl₃) = 194 g ÷ 137,33 g/mol.
n(PCl₃) = 1,412 mol.
From chemical reaction: n(PCl₃) : n(POCl₃) = 1 : 1.
n(POCl₃) = 1,412 mol.
V(POCl₃) = n(POCl₃) · Vm.
V(POCl₃) = 1,412 mol · 22,4 mol/dm³.
V(POCl₃) = 31,64 dm³ at normal pressure and temperature.
We can use two equations to solve this.
(1) - E = hf
E = Energy (J)
h = plank's constant (6.63 × 10⁻³⁴ J s)
f = frequency (Hz)
(2) - v = fλ
v = velocity of the wave (m/s)
f = frequency (Hz)
λ = wavelength (m)
the λ for the given wave is 625nm (625 x 10⁻⁹ m) and the velocity of the wave is equal to speed of light (3 x 10⁸ m/s) since the wave is a light.
hence we can find the frequency of the wave by using (2) formula.
3 x 10⁸ m/s = f x 625 x 10⁻⁹ m
f = 4.8 x 10¹⁴ Hz
by using calculated frequency and (1) formula, we can find the energy of the wave.
E = 6.63 × 10⁻³⁴ J s x 4.8 x 10¹⁴ Hz
E = 3.18 x 10⁻¹⁹ J
The energy of wave is less than energy needed to eject an electron.
Hence, the metal does not eject electron.
Answer:
The volume of balloon is 5.41 L.
Explanation:
The volume of helium (V1) = 5 L
Temperature (T1) = 1 degree Celsius
Now covert the temperature into kelvin by simply adding the 273 with given temperature. Thus, 1-degree Celsius = 274 kelvin.
The volume of balloon (V2) =?
Temperature (T2) = 24 degree Celsius
Now covert degree Celsius into kelvin. Thus, 24-degree Celsius = 297 kelvin.
Using Charl’s law.
