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3 years ago

What is meant by the wavelength of UV light

Chemistry

1 answer:

Evgesh-ka [11]3 years ago

4 0

Answer:

The wavelength is the distance from the peak of one wave to the peak of the next.

Explanation:

The wavelength of UV light ranges from 10 nm to 400 nm.

We can’t see UV light because our eyes can detect only light with wavelengths between 400 nm (violet) and 700 nm (red).

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Calcule la normalidad de una solución

tensa zangetsu [6.8K]

Answer:

si por favor

Explanation:

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3 years ago

Why is water less dense as a solid than a liquid? In ecological terms, why is this of particular importance?

Georgia [21]

<span>Persamaan setara pada reaksi besi dengan asam klorida membentuk besi (II) klorida dan gas hidrogen </span>

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3 years ago

1 C8H10(l) +21/2O2(g) → 8CO2(g) + 5H2O(g), Hcomb= ? Hf for C8H10(l) = +49.0kJ/mol C8H10(l) Use the balanced combustion reaction

nikklg [1K]

Answer:

$H_{comb}=-4406kJ/mol$

Explanation:

Hello,

In this case, the enthalpy of combustion is understood as the energy released when one mole of fuel, in this case octene, is burned in the presence of oxygen and is computed with the enthalpies of formation of the fuel, carbon dioxide and water as shown below (oxygen is circumvented as it is a pure element):

$H_{comb}=8*\Delta _fH_{CO_2}+5\Delta _fH_{H_2O}-\Delta _fH_{C_8H_{10}}$

Thus, since we already know the enthalpy of combustion of the fuel, for carbon and water we have -393.5 and -241.8 kJ/mol respectively, thereby, the enthalpy of combustion turns out:

$H_{comb}=8*(-393.5kJ/mol)+5(-241.8kJ/mol)-49.0kJ/mol\\\\H_{comb}=-4406kJ/mol$

Best regards.

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3 years ago

How can you tell the number of covalent bonds an element can form?

Sergio039 [100]

The number of bonds for a neutral atom is equal to the number of electrons in the full valence shell (2 or 8 electrons) minus the number of valence electrons. This method works because each covalent bond that an atom forms adds another electron to an atoms valence shell without changing its charge.

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3 years ago

In a simple covalent compound, which statement is TRUE

Savatey [412]

Answer:

C:to the right side of the periodic table, and it is given

the suffix -ide.

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2 years ago