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schepotkina [342]
3 years ago
12

An open tubular gas chromatography column is 35.7 m long and has an inner diameter of 0.250 mm. It is coated on the inside wall

with a layer of stationary phase that is 1.8 µm (0.0018 mm) thick. Unretained solute, methane, passes through in 6.39 min, whereas toluene has a retention time of 16.35 min. Calculate the retention factor for toluene.
Chemistry
1 answer:
Sidana [21]3 years ago
8 0

Answer:

The retention factor, k is 2.49

Explanation:

According to the theory of High-Performance Liquid Chromatography (HPLC), the retention factor (or capacity), k, of a column is the ratio of the retention time of a retained analyte (toluene) to that of the  un-retained solute (methane).

This implies that:

k = \frac{16.35  (mins)}{ 6.39 (mins)}  =  \frac{995 (secs)}{399 (secs)}

 retention factor, k  = 2.49.

Note that there is no unit for retention factor, as it is a ratio.

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What is the structure of polypropylene
pantera1 [17]

The Structure of polypropylene(C3H6)n is linear.

  • The chemical formula for polypropylene is (C3H6)n.
  • It is a polymer with complex structure and also known as polypropene.
  • Polypropylene is similar to polyethylene which belongs to polyolefin groups.
  • Generally the polymers are synthesized from the polymerization process.
  • What is polymerization?

The process in which atom or small molecules joined together repeatedly to form a polymer with complex structure is called as polymerization.

The repeated unit of atom or small molecule is called monomer

<h3>Structure of polypropylene</h3>

Polypropylene is synthesized from the polymerization of propylene which is the monomer unit.

It has a linear structure made of propylene hydrocarbon units.

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8 0
1 year ago
Aspirin is the common name for acetyl salicylic acid, CgH804. One tablet contains 0.325 g of aspirin. How many moles of aspirin
d1i1m1o1n [39]

Answer:

0.0018 moles

Explanation:

Given data:

mass of aspirin= 0.325 g

molar mass of aspirin= 180.1589 g/mol

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Formula:

number of moles= mass in gram/ molar mass (g/mol)

Solution:

now we will put the values in given formula:

number of moles of aspirin= mass of aspirin/ molar mass of aspirin

number of moles= 0.325 g/ 180.1589 g/mol

number of moles = 0.0018 mol

Mole:

Mole is the unit of amount in chemistry. it is SI unit and represented by "mol".

Example;

one mole of hydrogen has a mass of 1.008 g and contain 6.022× 10∧23  atoms.

7 0
4 years ago
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When these bond to make ccl4, what is the shape of a ccl4 molecule? linear circular tetrahedral trigonal planar
Aleks04 [339]
Its tetrahedral since there's four chlorine molecules around carbon
4 0
4 years ago
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In its life history in which stage the silk moth spin the silk fibre for class 7th Plz answer ​
KiRa [710]

Answer:

in the 4\5thstage

Explanation:

because it's the time where silk worm separate

4 0
3 years ago
PLEASE HELP TIMED! Thank u guyssss
Lemur [1.5K]

Answer:

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Isotope symbol: P

Explanation:

I hope this helps :)

8 0
3 years ago
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