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viva [34]
3 years ago
9

how do scientists apply emission spectra to investigate the chemical composition of stars. 1 page long essay.

Chemistry
2 answers:
BARSIC [14]3 years ago
6 0

Scientists use a spectroscope to receive the image of a spectra of light coming from faraway stars. Spectra is sometimes considered to be the fingerprint of the elements, with each elements having different spectra.

Explanation:

They do this by examining the spectrum of light from a star. When an ingredient is inspired, it gives off the light in distinct wavelengths, or colors.

The spectra of the Sun and stars presented bright and dark lines called Fraunhofer lines. Those were shown to be generated by elements transmitting or receiving light at specific wavelengths. Because each element emits or absorbs light only at specific wavelengths, the chemical distribution of stars can be resolved.

HACTEHA [7]3 years ago
5 0
Scientists use a spectroscope to receive the image of a spectra of light coming from faraway stars. Spectra is sometimes considered to be the fingerprint of the elements, with each elements having different spectra.
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What mass of ni has as many atoms as there are n atoms in 63.0 g of no2?
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First we have to calculate the number of moles.

\text{Moles of }NO_2=\frac{\text{Mass of }NO_2}{\text{Molar mass of }NO_2}=\frac{63g}{46g/mole}=1.369moles

Now we have to calculate the number of atoms of NO_2

As 1 moles NO_2 contains 6.022\times 10^{23} number of molecules

So, 1.369 moles NO_2 contains 1.369\times 6.022\times 10^{23} number of molecules

One NO_2 molecule has one nitrogen atom then 1.369\times 6.022\times 10^{23} number of molecules of NO_2 will contain 1.369\times 6.022\times 10^{23} number of nitrogen atoms

As per question number of Ni atoms is equal to the number of nitrogen atoms

Number of Ni atoms=1.369\times 6.022\times 10^{23} atoms

Number of moles = \frac{1.369\times 6.022\times 10^{23}}{6.022\times 10^{23}}=1.369moles

Mass of Nickel = Moles\times \text{Molecular mass}}

Molecular mass of Nickel = 58.69 g/mol

Mass of nickel = 1.369mol\times 58.69g/mol=80.346grams

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