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
dem82 [27]
3 years ago
13

Why is it important to cover the developing chamber​

Chemistry
1 answer:
Tom [10]3 years ago
6 0

Answer:A- It is important to keep the developing chamber covered with plastic wrap during the development of the chromatogram so the solvent vapor can saturate the air in the chamber, the solvent does not evaporate and the chromatogram develops properly and shows the correct cations present.

You might be interested in
37.9 grams of an unknown substance undergoes a temperature increase of
jenyasd209 [6]

Answer:

1.023 J / g °C

Explanation:

m = 37.9 grams

ΔT = 25.0*C

H = 969 J

c = ?

The equation relating these equation is;

H = mcΔT

making c subject of formulae;

c = H / mΔT

c = 969 J / (37.9 g * 25.0*C)

Upon solving;

c = 1.023 J / g °C

4 0
3 years ago
Calculate the mass of bromine in 50.0 g of potassium bromide
Elodia [21]

Answer:

6 Percent Composition. 1. Molar Mass of KBr K = 1(39.10) = 39.10 Br =1(79.90) =79.90 MM = 119.0 79.90 g        119.0 g = 0.6714 3. 0.6714 x 50.0g = 33.6 g Br 2.

4 0
3 years ago
The chart below lists data on four different projects designed to restore a wetlands habitat destroyed by human activity and a r
snow_lady [41]

Answer:

Project 3.

Explanation:

Project 3's anticipated cost is 12 to 17 million dollars. It is a <em>lower </em>anticipated cost than Project 2 and Project 4, but <em>higher</em> than Project 1 by one million dollars at maximum cost anticipation. Additionally, the percentage of wildlife to benefit is 70-80%, which is <em>second</em> to the most wildlife to benefit which is Project 4 at 75-80%.

And finally, for community support for Project 3 - the chart lists it as high. This outclasses Project 2 and Project 4, but balances with Project 1. However, Project 1 costs 13 to 16 million dollars and <em>only</em> benefits 15-25% of wildlife.

5 0
3 years ago
Which organic compound is correctly matched with the subunit that composes it?
Alex787 [66]
It is the Starch-glucose. Glucose is a solitary sugar particle that your body can retain specifically in the digestive system. Sucrose and starches are starches shaped by at least two sugars reinforced together. The sugars in sucrose and starch must be separated into glucose particles in the gastrointestinal tract before your digestive organs can assimilate them.
7 0
3 years ago
Answer with explanation
creativ13 [48]
The answer should be:

KOH (aq) + HCl (aq) --> KCl (aq) + H20 (l).

KOH is a base, because OH can accept a H+.
HCl is an acid because it can donate a H+.

In general, bases are : OH-, and acids are : H+.


8 0
3 years ago
Other questions:
  • The Power powe and th
    10·1 answer
  • HELP 50 POINTS WILL BE AWARDED I need 3-5 sentences that explains the importance of reaction types (combustion decomposition syn
    12·1 answer
  • Balancing Equations
    8·1 answer
  • The process in which organisms grow and replace worn-out cells is called: A. Cell regeneration B. Cell division C. Mitosis D. Bo
    14·1 answer
  • Express the van der Waals equation of state as a virial expansion in powers of 1/Vm and obtain expressions for B and C in terms
    15·1 answer
  • What's a material that contains oxygen and silicon??
    7·1 answer
  • What happens when sugar is heated? Give a balanced equation
    7·1 answer
  • What will be the result of the contraction of the universe?
    8·1 answer
  • [H+]=1×10−13 M pH= <br><br> what is this answeer
    12·1 answer
  • Fluids used for an intravenous transfusion must be ________ with bodily fluids. group of answer choices isosmotic hyperosmotic h
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!