how does a spectral signature help scientists determine the composition of planets and other stars???

Chemistry

1 answer:

sveticcg [70]3 years ago

6 0

Answer:

How do scientists determine the chemical compositions of the planets and stars? Each element absorbs light at specific wavelengths unique to that atom. When astronomers look at an object's spectrum, they can determine its composition based on these wavelengths. ... That fingerprint often appears as the absorption of light.

Explanation:

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When Oxygen in the air reacts with Iron, Iron Oxide forms.

Bess [88]

Answer:

I think its E. iron and iron oxide have the same properties if it's not e its d for sure

Explanation:

iron + oxygen → iron oxide. 4 Fe + 3 O2 → 2 Fe2O.

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3 years ago

Use scientific notation to express 3.76 mg in grams

makkiz [27]

There are 1000 mg in 1 gram.
3.76/1000 = 0.00376

10^-3 = 0.001

0.001 x 3.76 = 0.00376

Answer is
3.76 x 10^-3

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How fast is an airplane traveling that accelerates at a rate of 20 mph per second for 30 seconds?

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4 years ago

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A sample weighing 3.110 g is a mixture of Fe 2 O 3 (molar mass = 159.69 g/mol) and Al 2 O 3 (molar mass = 101.96 g/mol). When he

grandymaker [24]

Answer:

The mass fraction of ferric oxide in the original sample : $\frac{723}{3110}$

Explanation:

Mass of the mixture = 3.110 g

Mass of $Fe_2O_3=x$

Mass of $Al_2O_3=y$

After heating the mixture it allowed to react with hydrogen gas in which all the ferric oxide reacted to form metallic iron and water vapors where as aluminum oxide did not react.

$Fe_2O_3(s)+3H_2(g)\rightarrow 2Fe(s)+3H_2O(g)$