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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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Express each of the following in standard form.
swat32

Answer:3.6 x 101 or 8.77 x 10-1

3 0
2 years ago
If 1,079.75 Joules of heat are added to 77.75 grams of water, by how many degrees Celsius would the water increase? Assume water
djyliett [7]

Answer:

If 1,079.75 Joules of heat are added to 77.75 grams of water, by 3.32 degrees Celsius the temperature of  water will increase

\Delta T=3.32 C^{0}

Explanation:

q = mC\Delta T

Here , q = heat added / removed from the substance

m  = mass of the substance taken

\Delta T = Change in temperature

C = specific heat capacity of the substance

In liquid state the value of C for water is :

4.18 J/gC^{0}

Given values :

q = 1079.75 J

m = 77.75 gram

Insert the value of C, m , q in the given equation

q = mC\Delta T

on transposing ,

\Delta T=\frac{q}{mC}

\Delta T=\frac{1079.75}{77.75\times 4.18}

\Delta T=3.32 C^{0}

3 0
3 years ago
The answer to a chemistry question
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5 0
3 years ago
What volume is needed to make a 2.45 M solution of KCl using 0.50 mol of KCl
Ivan

Answer:

Explanation:

91.4

grams

Explanation:

C

=

m

o

l

v

o

l

u

m

e

2.45

M

=

m

o

l

0.5

L

2.45

M

⋅

0.5

L

=

m

o

l

m

o

l

=

1.225

Convert no. of moles to grams using the atomic mass of K + Cl

1.225

m

o

l

⋅

(

39.1

+

35.5

)

g

m

o

l

1.225

m

o

l

⋅

74.6

g

m

o

l

=

1.225

⋅

74.6

g

=

91.4

g

4 0
2 years ago
Which of the following is the correct formula used for calculating Speed?
MAXImum [283]

Answer:

A- Speed = distance/time

Explanation:

Would make sense and that's what I remember

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3 years ago
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