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Anvisha [2.4K]
3 years ago
15

Explain, in your own words, why different elements produce different colors of light when heated.

Chemistry
2 answers:
QveST [7]3 years ago
8 0
As the electrons return o lower energy levels they gain energy in the form of light so this means that the colour of the light depends on the difference between two levels
fgiga [73]3 years ago
7 0
Different elements produce different colors of light when heated because the electrons in these elements have different permissible energy levels. When an element is heated, the electrons inside it become excited and move to an higher energy level from the ground state. When the electrons drop from this higher energy level, they typically emit energy quantum, the color of the light that is observed at this stage depends on difference that exist in the two energy levels.<span />
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What is the boiling point of a solution made by adding 6.69 g of magnesium chloride to 250.0 g of water?. Use the formula of the
olya-2409 [2.1K]

Answer:

100.432ºC

Explanation:

Ebullioscopy is the elevation of the boiling point of a solvent that has a solute nonvolatile dissolved. The change in the temperature may be calculated by Raoult's law:

ΔT = Kb.W.i

Where <em>ΔT</em> is the temperature change, <em>Kb</em> is the ebullioscopy constant,<em> W</em> is the molality and <em>i</em> is the Van't Hoff factor, which determinates the particles that affect the proper.

The molality is:

W = m1/(M1xm2)

Where <em>m1</em> is the solute mass (in g), <em>M1</em> is the molar mass of the solute, and <em>m2</em> is the mass of the solvent (in kg).

The Van't Hoff factor is the number of final particles divided by the number of initial particles. Magnesium is from froup 2, so it forms the cation Mg⁺², and chlorine ins from group 7 and forms the anion Cl⁻, the salt is MgCl₂ and dissociates:

MgCl₂  → Mg⁺²(aq) + 2Cl⁻(aq)

So, it has 1 particle in initial, and 3 in final (1  Mg⁺² and 2 Cl⁻). So:

i = 3/1 = 3.

The molar mass of MgCl₂ is: 24.3 + 2x35.5 = 95.3 g/mol, m1 = 6.69g, m2 = 0.250 kg, so:

W = 6.69/(95.3x0.250)

W = 0.281 m

Then:

ΔT = 0.512x0.281x3

ΔT = 0.432ºC

The normal boling point of water is 100ºC, so

T - 100 = 0.432

T = 100.432ºC

6 0
3 years ago
CO2(s) --&gt; CO2(g) is an example of:
Naddika [18.5K]

Answer:

If I remember correctly, it should be a chemical change..I hope it's correct

Explanation:

3 0
3 years ago
I’ll give you a lot of points and mark you brainlist if you awnse all 3
suter [353]

Answer:

Magma

Volcanic glass

Granite and pumice

Explanation:

7 0
3 years ago
Read 2 more answers
Glucose is a simple sugar. It would most likely be found in which of the following foods?
olga55 [171]
It would be most likely to be found in carbohydrates
7 0
3 years ago
Read 2 more answers
According to the law of conservation of matter, what cannot change during a chemical reaction?.
Hunter-Best [27]

Answer:

the number of atoms

Explanation:

atoms are never created not destroyed

8 0
3 years ago
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