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irakobra [83]
3 years ago
5

If the bright lines in the spectrum of oxygen are matched by lines in the dark-line spectrum of the sun, what does that indicate

? A. The gaseous outside of the sun contains oxygen. B. There is no oxygen in the sun. C. The sun burns its fuel using oxygen. D. The spectrum can be detected only by a radio telescope.
Chemistry
2 answers:
lbvjy [14]3 years ago
7 0
Hello young fellow friend I think the anwser is (C)
kirill [66]3 years ago
5 0
I believe the answer is c

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Answer:

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Explanation:

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Heat gain by water = Heat lost by metal

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m_{water}\times C_{water}\times (T_f-T_i)=-m_{metal}\times C_{metal}\times (T_f-T_i)

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Or,  

m_{water}\times C_{water}\times (T_f-T_i)=m_{metal}\times C_{metal}\times (T_i-T_f)

For water:

Mass = 120 g

Initial temperature = 21.8 °C

Final temperature = 24.5 °C

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Mass = 40.2 g

Initial temperature = 99.3 °C

Final temperature = 24.5 °C

Specific heat of metal = ?

So,  

120\times 4.184\times (24.5-21.8)=40.2\times C_{metal}\times (99.3-24.5)

40.2C_{metal}\left(99.3-24.5\right)=120\times \:2.7\times \:4.184

40.2C_{metal}\left(99.3-24.5\right)=1355.616

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<u>This value corresponds to iron. Thus answer is B.</u>

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