Nuclear decay is a natural phenomena. Natural uranium 238/235 decays because its nucleus is unstable, potassium 40, carbon 14, they are all naturally occurring and they decay on their own. Others are man made and are very useful
Answer:
The answer to your question is 3 moles of CO
Explanation:
Data
mass of CO = ?
moles of O₂ = 1.50
Balanced chemical reaction
2C + O₂ ⇒ 2CO
Process
To solve this problem use proportion and cross multiplication. Use the coefficients of the balanced equation.
1 mol of oxygen ------------------ 2 moles of CO
1.5 moles of oxygen ----------- x
x = (1.5 x 2) /1
-Simplification
x = 3 / 1
-Result
x = 3 moles of CO
Answer:
Explanation:
When an electron jumps from one energy level to a lower energy level some energy is released in the form of a photon.
The difference in energy between the two levels is the energy of the photon and that energy is related to the frequency of the photon by the Einstein - Planck equation:
Where,
- E = energy of the photon,
- h = 6.626×10⁻³⁴ J.s, Planck constant, and
- ν = frequency of the photon.
So, to find the frequency you must first find the energy.
The transition energy can be calculated using the formula:
Where E₀ = 13.6 eV ( 1 eV = 1.602×10⁻¹⁹ Joules) and n = 1,2,3,...
So, the transition energy between n = 4 and n = 3 will be:
- ΔE = - E₀ [ 1/4² - 1/3²] = - 13.6 eV [1/16 - 1/9] = 0.6611. . .eV
- ΔE = 1.602×10⁻¹⁹ Joules/eV × 0.6611... eV = 1.0591 ×10⁻¹⁹ Joules
Now you can use the Einstein - Planck equation:
- ν = 1.0591 ×10⁻¹⁹ J / 6.626×10⁻³⁴ J.s = 1.60×10¹⁴ s⁻¹ (rounded to 3 significant figures).
Answer: 66N / 4.448 = 14.7lbs
Explanation:
this is coverted in to pounds
Answer:
Option (B)
Explanation:
The volatile substances are usually referred to those substances that can be easily evaporated into the atmosphere at normal temperature. Some of the common volatile present in the molten materials such as magma are H₂O, CO₂, H, N, CH₄, and SO₂.
These volatile substances are found to be mixed with the magma, which is commonly known as the molten material. When this magma comes out to the surface, the pressure decreases, and it escapes into the atmosphere forming bubbles, and these are harmful gases that are harmful to the atmosphere.
Thus, the correct answer is option (B).