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
nekit [7.7K]
3 years ago
15

All of the following are possible sources of error in a scientific investigation except for

Chemistry
2 answers:
lukranit [14]3 years ago
5 0
The answer to this question should be 3. <span>adding research resources during an investigation 
</span>
The answer 1 and 2 are similar. Discovering a new variable mean that you wouldn't control it at the beginning of the research. It would be too late if you try to control it. Incorrect measurement definitely will cause an error.


Norma-Jean [14]3 years ago
5 0

Answer is 3- adding research resources during an investigation  


You might be interested in
Explain how following a fitness plan can help you meet a goal
vodka [1.7K]
Because if you follow a fitness plan you can get done a lot of stuff that you can't without a plan so like you make a plan of what you are going to do instead of just doing random fitness stuff
6 0
4 years ago
Read 2 more answers
An electron na hydrogen atom moves from level to level 4 The electron then drops from level 4 to level 2. Which statement
Vsevolod [243]

Answer:

The energy absorbed in the first move is greater than the energy released in the second move.

Explanation:

The greater the level number the greater the energy.

A movement up a level requires energy so energy id absorbed.

Dropping down a level releases energy.

3 0
3 years ago
You need to dissolve cacl2 in water to make a mixture that is 35% calcium chlorode by mass. if the total mass of the mixture is
nadya68 [22]
((mass solute)/(mass solution)) * 100% =35%
mass CaCl2=0.35*352.5=123.4 g CaCl2
6 0
3 years ago
What is the electron configuration for N (nitrogen)?
ollegr [7]

Answer:

1s^22s^22p^3

Explanation:

Nitrogen has the atomic number = 7

So, No. of electrons = 7

<u><em>Electronic Configuration:</em></u>

1s^22s^22p^3

<u>Remember that:</u>

s sub shell holds upto 2 electrons while p sub shell upto 6

7 0
3 years ago
The difference in the heights of the Hg columns in Diagram B is17 mm-Hg. If the atmospheric pressure is 769 mm-Hg, what is the p
Korvikt [17]

The pressure of the confined gas will be 769-17 = 752 mmHg

<h3>What is Manometer ?</h3>

Manometer is a U shaped instrument which is used to measure the pressure acting on a column of fluid , a difference in the pressure  in the two arms of the manometer causes the liquid to reach different heights.

The difference  in the heights of the Hg columns in Diagram B is17 mm-Hg.

the atmospheric pressure is 769 mm-Hg,

the pressure of the confined gas in mm-Hg = ?

The pressure of the confined gas will be 769-17 = 752 mmHg

To know more about Manometer

brainly.com/question/18354578

#SPJ1

3 0
2 years ago
Other questions:
  • You throw a barbeque for your friends. Before you start the grill, your propane tank has a pressure of 78 psi. When you’re finis
    6·2 answers
  • A partially-enclosed coastal region where sea water mixes with freshwater is called a(n) _______.
    14·1 answer
  • Look at the image above. Which statement below is NOT accurate?
    9·2 answers
  • If methyl orange is added to a substance and it turns the substance red, what does this tell you about the pH of the substance?
    9·2 answers
  • The atom in a chemical bond that attracts electrons more strongly acquires a(n)____________ charge, and the other atom acquires
    11·1 answer
  • What is the best step for the engineers to make next
    11·1 answer
  • 29. Spongebob loves to garden and wants to grow lots of pink flowers for his pal Sandy. He bought a special Flower Power fertili
    8·1 answer
  • The diagram below shows part of the rock cycle. (6 points)
    13·2 answers
  • What foods of the aztec found their way into mayan cooking?.
    11·1 answer
  • An intermediate step in the production of nitric acid involves the reaction of ammonia with oxygen gas to form nitrogen monoxide
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!