in this lab you observed that each element emits a unique color of light when heated in a flame. If these light emissions were e
xamined through a prism, you would observe that the emitted light is actually composed of different wavelengths of light that may lie in the violet region, the green region, or the red region of the visible spectrum. Each element has a unique emission spectrum. Look up the emission spectra for the element tested in this lab. Do research on how scientists apply these emission spectra to investigate the chemical composition pf stars. For example what is the emission spectrum of the sun, and what does this spectrum reveal about the types of elements in the sun
2 answers:
Answer:
<u>The solar emission spectrum show us all the elements that are part of the sun</u>. This spectrum is called Fraunhofer Lines after its discovery by a German physicist named Joseph von Fraunhofer
Explanation:
When looking at emission spectrums, keep in mind, the black lines represent the element that is making part of the studied object.
The black lines that appear in the sun emission spectrum, are named "Fraunhofer Lines" and each one is represented by a letter, as we can see in the image below.
Letters A and B , are made by the Oxygen from our atmosphere.
Letter C: Hydrogen α
Letter D: Sodium
Letter E: Iron
Letter F: Hydrogen β
Letter G: Iron
Letter H: Calcium
Letter K: Calcium
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<u>Answer:</u> The balanced chemical equation is written below.
<u>Explanation:</u>
Double displacement reaction is defined as the reaction in which exchange of ions takes place.
When sodium permanganate reacts with iron (III) chloride, it leads to the production of sodium chloride and iron (III) permanganate.
The chemical equation for the reaction of sodium permanganate and iron (III) chloride follows:
By Stoichiometry of the reaction:
3 moles of aqueous solution of sodium permanganate reacts with 1 mole of aqueous solution of iron (III) chloride to produce 1 mole of solid iron permanganate and 3 moles of aqueous solution of sodium chloride
Hence, the balanced chemical equation is written above.
Answer:
B
Explanation:
Recall the law of effusion:
Because 5 mol of oxygen was effused in 10 seconds, the rate is 0.5 mol/s.
Let the rate of oxygen be <em>r</em>₁ and the rate of hydrogen be <em>r</em>₂.
The molecular weight of oxygen gas is 32.00 g/mol and the molecular weight of hydrogen gas is 2.02 g/mol.
Substitute and solve for <em>r</em>₂:
Because there are 5 moles of hydrogen gas:
In conclusion, it will take about 2.5 seconds for the hydrogen gas to effuse.
Check: Because hydrogen gas is lighter than oxygen gas, we expect that hydrogen gas will effuse quicker than oxygen gas.