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
soldi70 [24.7K]
4 years ago
10

Which of the following should be done when designing an experiment for a controlled scientific investigation?

Chemistry
2 answers:
GalinKa [24]4 years ago
6 0

Answer:

The correct answer is letter D.

Explanation:

A controlled scientific investigation is manipulated by a scientist. The intention is to examine a single variable at a time. To do so, it is necessary to have as much control as possible over the experiment and the environment. Listing the procedures, planning the variables, and listing the needed materials are all necessary to design an experiment.

Alisiya [41]4 years ago
4 0
D - All of these should be done
You might be interested in
Naphthalene combustion may be used to calibrate the heat capacity of a bomb calorimeter. The heat of combustion of naphthalene i
tino4ka555 [31]

Answer:

.

Explanation:

5 0
3 years ago
Predict how many grams of KCI is produced from 40 grams of K?
Nutka1998 [239]

Explanation:

firstly find for the molar mass of kcl and molar mass of k

and then

molar mass of k = x

molar mass of kcl= 40

cross mutiply and then simplify you will get your answer

5 0
4 years ago
Wrong answers only!<br><br><br> What color is an orange?
Anastaziya [24]

Answer:

Blue

Explanation:

5 0
2 years ago
Read 2 more answers
Identify some other substances (besides KCl) that might give a positive test for chloride upon addition of AgNO3. Based on the r
SashulF [63]

Answer:

Other substances that give a positive test with AgNO3 are other chlorides present, iodides and bromide. However iodides and bromides have different colours hence they will not give a false positive test for KCl. Other chlorides present may lead to a false positive test for KCl.

Explanation:

In the qualitative determination of halogen ions, silver nitrate solution is used. Various halide ions give various colours of precipitate with silver nitrate. Chlorides yield a white precipitate, bromides yield a cream precipitate while iodides yield a yellow precipitate. All these ions or some of them may be present in the system.

However, if other chlorides are present, they will also yield a white precipitate just as KCl leading to a false positive test for KCl. Since other halogen ions yield precipitates of different colours, they don't lead to a false test for KCl. We can exclude other halides from the tendency to lead us to a false positive test for KCl but not other chlorides.

3 0
3 years ago
What is the molecular geometry around each carbon atom in a saturated hydrocarbon?
Lelu [443]
Answer:
            <span>Molecular geometry around each carbon atom in a saturated hydrocarbon is Tetrahedral.

Explanation:
                     </span> In saturated hydrocarbons (-CH₂-) the central atom (carbon) is bonded to either three or two hydrogen atoms and one or two carbon atoms. So, the central atom is having four electron pairs and all pairs are bonding pairs and lacks any lone pair of electron. According to Valence Shell Electron Pair Repulsion (VSEPR) Theory the central atom with four bonding pair electrons and zero lone pair electrons will attain a tetrahedral geometry with bond angles of 109°. 

7 0
3 years ago
Read 2 more answers
Other questions:
  • Plz help. I just need someone to check answer. :(
    15·1 answer
  • If a solid has a density greater than 1 g/ml will it sink or float?
    11·1 answer
  • Ba(oh)2+H3po4+h2o how is it <br> balance ?
    11·1 answer
  • A weather vane is a weather instrument used to measure wind
    12·2 answers
  • How so I figure out the number of elecrons per energy level?<br><br>THIS IS MY OWN CREATED ELEMENT!!
    10·2 answers
  • *CHEMISTRY*
    5·2 answers
  • What elements on the periidic table are metalloids<br><br>​
    13·1 answer
  • 1) If you have 2.6 moles of iron (III) oxide, how many molecules of iron (III)
    5·1 answer
  • Please help me if possible<br>​
    6·1 answer
  • A cell membrane acts as a boundary between the cell and its external environment. What is another role of the cell membrane?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!