1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
denis23 [38]
3 years ago
8

You are given a sample of several compounds to separate by paper chromatography. You draw a pencil line exactly 1.00 cm from the

bottom of the paper, and place a spot of sample on it. You dry the sample, then develop it in a solvent. When the chromatogram is taken out of the solvent, the paper is wet up to 9.2 cm from the bottom of the sheet. The compound you are interested in shows up as a spot 7.1 cm from the bottom of the paper. Calculate the following:
a. How far did the compound move?
b. In the same time, how far did the solvent move?
c. What is the Rf factor for the compound?
Chemistry
1 answer:
Pavel [41]3 years ago
7 0

Answer:

a) 6.3 cm

b) 8.0 cm

c) 0.7875

Explanation:

(a) The compound has moved above upto 7.3 cm from the bottom of the paper. Let us assume that line is drawn at 1.0 cm mark as the origin of spot. \

Distance traversed by compound= 7.3 - 1.0 cm = 6.3 cm

(b) Distance traversed by the solvent = 9.0 - 1.0 cm = 8.0 cm

(c) The Rf = Compound Migration distance / Solvent front migration distance

                      = 6.3/8.0 = 0.7875

You might be interested in
Within the context of a person trying to explain why she did well on a psychology exam, an internal attribution is to an externa
Vaselesa [24]
Instinct to learning.

Please vote my answer branliest! Thanks.
5 0
4 years ago
Copper metal (Cu) reacts with silver nitrate (AgNO3) in aqueous solution to form Ag and Cu(NO3)2. An excess of AgNO3 is present.
aev [14]


we are given the reaction Cu + 2AgNO3 ---> Cu(NO3)2 + 2Ag. This means for every mole Cu used, there are 2 moles of Ag produced. In this case, given 31.75 g Cu, converting to moles through molar mass and using stoichiometric ratio and the molar mass of Ag, the mass Ag produced is 107.9 grams. 
8 0
3 years ago
Read 2 more answers
Scott made a model of the water cycle by filling a tub with water, covering the tub with clear plastic, and placing a heat lamp
Dmitry_Shevchenko [17]
Condensation formed the water droplets in scotts model
5 0
3 years ago
Read 2 more answers
Pls answer
nataly862011 [7]

Answer:

The sound wave travelled more quickly through the glass of water than the metal pole.

The sound wave travelled the fastest through the helium.

The sound wave travelled the slowest through the metal pole.

These 3 are most likely true.

<u>If you have to </u><u>pick</u><u> </u><u>just</u><u> </u><u>one</u><u>,</u> the sound wave travelled the fastest through the helium.

3 0
3 years ago
Read 2 more answers
Which of the following is NOT soluble in water?
raketka [301]
The correct answer is E. C6H6 is not soluble in water. This is determined by the polarities of these substances. Benzene is a non-polar substance because it has equal number of electrons sharing a bond thus it does not dissolve in water which is a polar substance.
7 0
3 years ago
Read 2 more answers
Other questions:
  • What is the pH of a 0.28 M solution of ascorbic acid (Vitamin C)? (The values for Ka1 and Ka2 for ascorbic acid are 8.0×10−5 and
    5·1 answer
  • How far is the earth from the sun?
    7·1 answer
  • Discuss how you can represent a chemical reaction using a system of linear equations. Use the chemical reaction from your projec
    11·1 answer
  • What is the charge of a magnesium ion?
    5·2 answers
  • Consider the following chemical reaction:
    12·1 answer
  • Electron configuration of br-1
    6·1 answer
  • :Why is a fuse used as a<br> safety feature in a circuit
    12·1 answer
  • After air enter the body through the nose or mouth it then goes to the <br> what?
    10·1 answer
  • 50 POINTS!!!!!!!!!
    14·1 answer
  • What is the name of the compound N2O5​
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!