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3 years ago

Explain how boiling and evaporating are alike and how they are differant

Chemistry

1 answer:

julsineya [31]3 years ago

7 0

Answer:

The main difference between evaporation and boiling are : 1. Evaporation takes place at all temperatures, while boiling occurs at a particular temperature. 2. Evaporation takes place from the surface, whereas the entire liquid boils. 3. Evaporation can occur using the internal energy of the system, while boiling requires an external source of heat.

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Explanation:

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2 years ago

Which of the following lists elements from lowest to highest atomic number

vitfil [10]

Lowest is Hydrogen highest is <span>Beryllium
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3 years ago

A student sees an absorbance a=1.140 for his solution that has a concentration of c=1.50*10-4 m using 0.50 cm cuvette. what is t

777dan777 [17]

The molar extinction coefficient is 15,200 $M^{-1} cm^{-1}$ .

The formula to be used to calculate molar extinction coefficient is -

A = ξcl, where A represents absorption, ξ refers molar extinction coefficient, c refers to concentration and l represents length.

The given values are in required units, hence, there is no need to convert them. Directly keeping the values in formula to find the value of molar extinction coefficient.

Rewriting the formula as per molar extinction coefficient -

ξ = $\frac{A}{cl}$

ξ = $\frac{1.140}{1.5*10^{-4}*0.5 }$

Performing multiplication in denominator to find the value of molar extinction coefficient

ξ = $\frac{1.140}{0.000075}$

Performing division to find the value of molar extinction coefficient

ξ = 15,200 $M^{-1} cm^{-1}$

Hence, the molar extinction coefficient is 15,200 $M^{-1} cm^{-1}$ .

Learn more about molar extinction coefficient -

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1 year ago

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Answer: 1. 3.914 × ^10-4 | 2. 4.781 × ^10-1

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3 years ago

What kind of intermolecular forces act between a sodium cation and an ammonia molecule? Note: If there is more than one type of

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Answer:

Ion-dipole forces

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Na⁺ is a cation, that is, an ion with a positive charge.

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The intermolecular forces between Na⁺ (ion) and NH₃ (dipole) are ion-dipole forces.

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