The air flowe through the trachea
Answer:
frequency = 2.07 x 10¹³ Hz
Explanation:
To find the frequency of the photon, you need to use the following equation:
E = hv
In this formula,
-----> E = energy (J)
-----> h = Planck's Constant (6.626 x 10⁻³⁴ J*s)
-----> v = frequency (Hz)
Since you have been given values for two of the variables (in the correct units), you can plug them into the equation and simplify to find the frequency.
E = hv <----- General Equation
E = (6.626 x 10⁻³⁴ J*s)v <---- Plug in Planck's Constant
1.37 x 10⁻²⁰ J = (6.626 x 10⁻³⁴ J*s)v <----- Plug in energy (given)
2.07 x 10¹³ = v <----- Divide both sides by 6.626 x 10⁻³⁴
Answer:
The solvent will be not be suitable because ΔS > 0
Explanation:
The entropy measures the disorder of the system, and by the second law of the thermodynamics, it's always increasing. So, a glass that broked (increased in disorder) does not intend to be fixed naturally.
So, when ΔS > 0, it means that the disorder in the system increased, the reaction occurred spontaneously. ΔSºvap is positive for that solvent, so it means that it will boil.
Answer:
When an alkali metal hydroxide is added to an aqueous solution of cobalt (II) salt, Cobalt(II) hydroxide precipitates as a solid
Explanation:
When an alkali metal hydroxide is added to an aqueous solution of cobalt (II) salt, Cobalt(II) hydroxide precipitates as a solid . For example, 2 NaOH +Co²⁺ →2Na + Co(OH)₂
From the water ligands Hydrogen ion attached to the cobalt ion is removed by the hydroxide ions.
From two of the water molecules , a hydrogen ion has been removed , then the resultant is a complex with no charge i.e. a neutral complex.
One of the important property of cobalt (II) hydroxide are it is slightly soluble in water and it is insoluble in alkalis.
The mass number of a carbon isotope that has seven neutrons is carbon-13