The answer is [OH⁻] = 1 x 10⁻⁸.
To find OH⁻, divide the ionic product of water by [H₃O⁺] as :
<u>OH⁻ + H₃O⁺ = H₂O</u>
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- [OH⁻] = 1 x 10⁻¹⁴ / 1 x 10⁻⁶
- [OH⁻] = 1 x 10⁻⁸
Atomic line spectra are a series of colored lines that are revealed when the atom is brought to a relaxed state from an excited state.
The colored lines occur due to the fact that electrons give off energy in the form of photons when moving from higher to lower energy level. These photons are in the visible light range and are seen as colors. The line spectra are unique to the element because each element has its own electronic configuration, since it has its own number of electrons.
Answer:
A
Explanation:
When a reaction happens some of the reactants mass is released as energy so the mass of the product would be less
Answer:
B. A worker should not feel air moving around the chemical hood.
Explanation:
Hello!
In this case, since chemical hoods are used to remove the hazardous vapors given off by volatile chemicals, the idea is that the workers do not get in contact, in anyway, with those vapors as they can affect their health and safety at the laboratories.
It means that options A and C are ruled out because they describe an scenario in which the worker is in contact with the vapors and also because the vapors are removed via a fan system that withdraws the vapors.
Therefore the correct option is B. A worker should not feel air moving around the chemical hood.
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Answer:
P.E = 493920 j
Explanation:
Given data:
Mass = 1200 kg
height = 42 m
Potential energy = ?
Solution:
Formula:
<em>P.E = mgh</em>
Now we will put the values in formula.
g = 9.8 m/s²
P.E = 1200 Kg × 9.8 m/s²× 42 m
P.E = 493920 Kg.m²/s²
Kg.m²/s² = j
P.E = 493920 j