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
Sophie [7]
3 years ago
10

How do researchers select a sample that is representative of its population

Chemistry
1 answer:
tiny-mole [99]3 years ago
7 0

Explanation:

Using stratified random sampling, researchers must identify characteristics, divide the population into strata, and proportionally choose individuals for the representative sample. ... For example, individuals who are too busy to participate will be under-represented in the representative sample.

You might be interested in
Give two possible sets of four quantum numbers for the electron in hydrogen when it is in its lowest energy state.
konstantin123 [22]

Answer:

Explanation:

The electron in the lowest energy state will be found in 1 s energy level.

set of 4 possible quantum numbers

Principal quantum no : n = 1 ,

Azimuthal quantum no l = 0

Magnetic quantum no m = 0

Spin quantum no  s = + 1/2

set of other quantum nos

Principal quantum no : n = 1 ,

Azimuthal quantum no l = 0

Magnetic quantum no m = 0

Spin quantum no  s = - 1/2

4 0
3 years ago
Colorimetric methods of analysis are based on having a reagent that changes _____________ as a function of the concentration of
GREYUIT [131]

Colorimetric methods of analysis make use of Color changes in reagents to decipher the concentration of solutions.

Therefore, color completes the sentence

<h3>Colourimetric analysis</h3>

Generally, Colorimetric analysis is used to know the concentration of a chemical element in a solution while using colour indicators or reagents.

Therefore

Colorimetric methods of analysis are based on having a reagent that changes Color as a function of the concentration of the analyte.

Color

For more information on  Compound

brainly.com/question/704297

3 0
2 years ago
Hi, can someone help me with chemistry
Dominik [7]
Idk look it up on another website
6 0
3 years ago
Draw the Lewis structure for the compound with the formula COCl2COCl2. Use lines to show bonding electrons.
stira [4]

Answer :  The Lewis-dot structure of COCl_2 is shown below.

Explanation :

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

In the Lewis-dot structure the valance electrons are shown by 'dot'.

The given molecule is, COCl_2

As we know that carbon has '4' valence electrons, chlorine has '7' valence electron and oxygen has '6' valence electrons.

Therefore, the total number of valence electrons in COCl_2 = 1(4) + 2(7) + 1(6) = 24

According to Lewis-dot structure, there are 8 number of bonding electrons and 16 number of non-bonding electrons.

6 0
3 years ago
In what direction does thermal energy transfer?
11Alexandr11 [23.1K]

Answer:

Either direction

Explanation:

If you cook food it would go from cold to hot. If you were to put a drink in the fridge it would go from hot to cold. So it is either direction.

5 0
3 years ago
Other questions:
  • Which of the following is a unit of mass?
    5·1 answer
  • Is the chemical equation CH4 +202 + 2H2O + CO2 balanced?
    5·2 answers
  • What is the particle theory of matter<br> please answer quickly schoool project
    10·1 answer
  • How are chemical changes of matter related to the organization of the periodic table
    7·1 answer
  • Describe how spead, velocity and<br> brcoloration are related.
    8·1 answer
  • QY
    15·1 answer
  • How did scientists respond to Copernicus's discovery?
    6·2 answers
  • Which of the following are properties of compounds formed by ionic bonding? Hint: Select the best three answers.
    14·1 answer
  • How many moles of sodium cyanide (NaCN) would be needed to
    10·2 answers
  • 30 POINTS MATCH THE DEFINITIONS PLEASE, ITS PROBABLY EASY FOR U THO
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!