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trasher [3.6K]
3 years ago
6

(a)Name a technique to seperate a mixture of two or more miscible liquids for which difference in boiling point is less than 25

k ?
(b)describe the structure of the column used in the above technique . why is it used ?
Chemistry
1 answer:
MArishka [77]3 years ago
5 0

Answer:

(a) fractional distillation

(b) the column consists of a distilling flask, a fractionating column, a thermometer, a bunsen burner, and a beaker to collect the distilled liquid. it is used to separate liquid with close boiling points also, the fractionating has glass beads and a large surface area for condensation and vaporization of liquid

Explanation:

fractional distillation is used to separate liquids with close boiling points

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Consider the following balanced reaction. How many grams of water are required to form 75.9 g of HNO3? Assume that there is exce
Iteru [2.4K]

Answer:

10.85 g of water

Explanation:

First we write the balanced chemical equation

3NO_{2} +H_{2}O -->2HNO_{3} +NO

Then we calculate the number of moles of nitric acid produced

n(HNO3) = \frac{mass}{molar mass} =\frac{75.9g}{63.02g/mol}=1.2044 mol

According to the balanced equation, water needed in moles is always half the number of moles of HNO3 produced. So since we will produce 1.2044 mol of HNO3, we will need 0.6022 mol of water. Now to calculate what mass that is:

mass(water)=number of moles*molar mass=0.6022mol*18.02g/mol=10.85g

5 0
3 years ago
Which of these solid compounds are most likely to have its dominant bonding mechanism as covalent? (Select all that are true.)
I am Lyosha [343]

The compounds that have covalent bonding as their dominant bonding scheme are diamond and silica.

A covalent bond is formed between two nonmetals. Usually, when two nonmetals combine, electrons are shared between the two atoms involved in the bond.

Now, the solids diamond and silica are predominantly covalent solids. The atoms that combine in diamond are carbon atoms(nonmetals) while the atoms that combine in silica are silicon and oxygen (nonmetals also)

Hence, diamond and silica both have covalent bonding as their dominant bonding scheme.

Learn more: brainly.com/question/11527546

8 0
2 years ago
As Mia mixed two substances in a test tube, she noticed that the test tube became warm. She also noticed gas coming from the tes
ss7ja [257]

Answer:

a new substance was forming

Explanation:

8 0
3 years ago
Considering the activity series given below for metals and nonmetals, which reaction will occur?
Levart [38]

Answer:

Given the activity series of elements, the reaction that will occur is: 2AgNO3 + Ni -----> Ni(NO3)2 + 2Ag

3 0
2 years ago
A light microscope would be most advantageous for viewing which of the following? a. small molecule such as water b. a DNA stran
nignag [31]

Answer:

D

Explanation:

The resolution of a light microscope is approximately 200 nanometers due to the wavelength of light. A eukaryotic cell is approximately 1 – 5 micrometers. This means that light can be used to view a eukaryotic cell because the wavelength of light is smaller than the size of the cell. The other options are of a smaller size than the light wavelength and hence lower wavelength beams (such as those of electron microscope) or laser can be used to view them.

5 0
3 years ago
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