All categories

3 years ago

The laboratory process of distillation does not involve

Chemistry

2 answers:

Fiesta28 [93]3 years ago

7 0

Liquids with the same boiling points because they will evaporate at the same time leaving you without a solution.

riadik2000 [5.3K]3 years ago

5 0

C liquids with different boiling points, to distill you only use one liquid

You might be interested in

Enter your answer in the provided box. The atomic masses of 63Cu (69.17 percent) and 65Cu (30.83 percent) are 62.94 and 64.93 am

dybincka [34]

Answer: The average atomic mass of copper is 63.55 amu.

Explanation:

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$ .....(1)

For $_{29}^{63}\textrm{Cu}$ isotope:

Mass of $_{29}^{63}\textrm{Cu}$ isotope = 62.94 amu

Percentage abundance of $_{29}^{63}\textrm{Cu}$ = 69.17 %

Fractional abundance of $_{29}^{63}\textrm{Cu}$ isotope = 0.6917

For $_{29}^{65}\textrm{Cu}$ isotope:

Mass of $_{29}^{65}\textrm{Cu}$ isotope = 64.93 amu

Percentage abundance of $_{29}^{65}\textrm{Cu}$ = 30.83 %

Fractional abundance of $_{29}^{65}\textrm{Cu}$ isotope = 0.3083

Putting values in equation 1, we get:

$\text{Average atomic mass of Copper}=[(62.94\times 0.6917)+(64.93\times 0.3083)]\\\\\text{Average atomic mass of copper}=63.55amu$

Hence, the average atomic mass of copper is 63.55 amu.

4 0

3 years ago

Why is there such a large jump and ionization energy between the second and third ionization energy‘s for magnesium?

Romashka [77]

The second ionization energy of Mg is larger than the first because it always takes more energy to remove an electron from a positively charged ion than from a neutral atom. The third ionization energy of magnesium is enormous, however, because the Mg2+ ion has a filled-shell electron configuration.

5 0

3 years ago

Elements that readily lose electrons tend to have

babymother [125]

Answer:

C) low ionization energy and low electronegativity

Explanation:

8 0

3 years ago

What is the main difference between the Bohr model and the electron cloud model of the atom.

mars1129 [50]

Answer: The main difference between the two models was about the location of the electron in an atom.

Explanation: Bohr in his model described that the electrons are revolving around the nucleus in discrete circular paths known as shells or orbits. He was not able to explain the exact or probable location of the electrons in an atom.

But, Electron cloud model which was given by Erwin Schrodinger explained the probability of finding an electron in an atom by using the emission spectra of that atom.

Hence, the main difference between these two models was on the location of electron in an atom.

5 0

3 years ago

Read 2 more answers

Is breaking bottles a physical or chemical change? Explain why?

xenn [34]

Breaking bottles is a physical change because it does not change the chemical makeup of the glass

8 0

3 years ago