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valentina_108 [34]
3 years ago
14

1. Explain how a bright-line spectrum is produced, in terms of excited state,

Chemistry
1 answer:
laila [671]3 years ago
8 0
Answer:

energy released - excited to ground -An electron absorbs energy and moves to a higher shell (energy level). As the electron returns to a lower shell (energy level), it releases energy in the form of a bright- line spectrum.
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PLEASEEEEEEEEEE HELP!!!!!!!!
ki77a [65]

Answer:

The total energy of the system is maintained as energy is transformed.

Explanation:

The total energy of the system is conserved.

8 0
3 years ago
Is there a way of making your hair grow longer without spending for hair growth?
miv72 [106K]
No technically without buying anything your hair will not grow .
4 0
4 years ago
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De acuerdo con la Ley de la Conservación de la Materia postulada por Lavoisier, ¿cuál ecuación química está balanceada? A C2H5OH
olya-2409 [2.1K]

Answer:

C C2H5OH(l) + 3O2(g) → 2CO2 + 3H2O

Explanation:

La ley de conservación de la materia implica que en una reacción química los átomos en los reactivos son iguales a la cantidad de átomos en los productos:

A C2H5OH(l) + O2(g) → CO2 + H2O

En los reactivos hay dos átomos de carbono pero en los productos solo 1. De esta manera, no cumple la ley de conservación.

B C2H5OH(l) + O2(g) → 2CO2 + H2O

En los reactivos hay 6 átomos de hidrógeno pero en los productos solo 2. No cumple la ley de conservación.

C C2H5OH(l) + 3O2(g) → 2CO2 + 3H2O

En los reactivos y productos hay: 2 átomos de carbono, 6 átomos de hidrógeno y 7 átomos de oxígeno. Cumple la ley de conservación.

D C2H5OH(l) + O2(g) → 2CO2 + 3H2O

En los reactivos hay 3 átomos de oxígeno y en los productos 7. No cumple la ley de conservación.

E 2C2H5OH(l) + 3O2(g) → 2CO2 + 3H2O

En los reactivos hay 4 átomos de carbono y en los productos solo dos. No cumple la ley de conservación.

6 0
3 years ago
Which of the following is a sign a chemical reaction has occurrd
anzhelika [568]
Change in color, change in temperature, formation of a gas, and formation of a precipitate
5 0
3 years ago
You need to make an aqueous solution of 0.237 M chromium(III) acetate for an experiment in lab, using a 500 mL volumetric flask.
julsineya [31]

Answer: 27.1 g of solid chromium(III) acetate should be added.

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

Molarity=\frac{n\times 1000}{V_s}

where,

n = moles of solute

V_s = volume of solution in ml

moles of Cr(CH_3COO)_3 = \frac{\text {given mass}}{\text {Molar mass}}=\frac{xg}{229g/mol}

Now put all the given values in the formula of molality, we get

0.237=\frac{xg\times 1000}{229g/mol\times 500ml}

x=27.1

Therefore, 27.1 g of solid chromium(III) acetate should be added.

3 0
3 years ago
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