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Serjik [45]
3 years ago
7

Explain how line spectra are used to identify elements and what they indicate about atoms

Chemistry
1 answer:
Advocard [28]3 years ago
3 0

Electron transitions from higher to lower energy levels cause emission of energy in the form of electromagnetic waves, each with their own specific wavelength. Because the energy levels of elements are quantized, each transition has a specific energy difference. The collection of these transitions makes up the emission spectrum and each spectrum is unique to a specific element, allowing identification.

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The atomic number is the same as the number of ________.
Zanzabum

Answer:

number of electrons

Explanation:

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3 years ago
.How many grams of NaCl required to form a 500ml solution with a molarity of 0.5M , the molar mass of NaCl is 58.5g/mol?
MaRussiya [10]
The answer will be 14.625
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2 years ago
Protein x has an absorptivity of 0.4 ml·mg-1 ·cm-1 at 280 nm. What is the absorbance at 280 nm of a 2.0 mg ·ml-1 solution of pro
Evgen [1.6K]

Absorbance measures the ability of the substance to absorb light at a specific wavelength.

Absorbance is also equal to the product of molar absorptivity, path length and molar concentration.

The mathematical expression is given as:

A= \epsilon l c       (1)

where, A = absorbance

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l = path length

c  = molar concentration.

The above formula is said to Beer's Law.

Absorptivity of protein x  = 0.4 mLmg^{-1}cm^{-1}

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Put the values in formula (1)

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= 0.8

Thus, absorbance at 280 nm = 0.8

3 0
4 years ago
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Answer:

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How could you use melting and boiling point to identify a substance
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You can identify a substance, by testing the melting and boiling point and find a known substance that has the same melting and boiling points as the one tested
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