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
belka [17]
3 years ago
11

A -------(fact, hypothesis, theory) is scientific knowledge established through direct observation and remains constant. Scienti

fic knowledge can change when scientists ------( conduct experiment, generate hypothesis, hold different views).
Chemistry
2 answers:
Lerok [7]3 years ago
4 0
<h2>Answer:</h2>

1. The first choice is correct which is<u> fact.</u>

2. The first choice which is <u>conduct experiment</u> is correct.

<h3>Explanation:</h3>

A fact is nonscientific observation based law which can not be changed because any experiment could not be conducted to test it. As the sun sets in the west.

While a scientific theory or observation can be changed because experiment can be conducted on these. As dengue is caused due to a virus.

lutik1710 [3]3 years ago
3 0
I believe that you are needing to pick from the three word choices. I believe the first one would be fact and the second one would be conduct experiment.
You might be interested in
42.9 liters of hydrogen are collected over water at 76.0 °C and has a pressure of 294 kPa. What would the pressure (in kPa) of t
BabaBlast [244]

Answer:

494.1 kPa

Explanation:

Using the combined gas law equation;

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure (kPa)

P2 = final pressure (kPa)

V1 = initial volume (L)

V2 = final volume (L)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information provided in this question,

P1 = 294 kPa

P2 = ?

V1 = 42.9 liters

V2 = 22.8 liters

T1 = 76.0°C = 76 + 273 = 349K

T2 = 38.7°C = 38.7 + 273 = 311.7K

294 × 42.9/349 = P2 × 22.8/311.7

12612.6/349 = 22.8 P2/311.7

36.14 = 22.8P2/311.7

Cross multiply

36.14 × 311.7 = 22.8P2

11264.605 = 22.8P2

P2 = 11264.605 ÷ 22.8

P2 = 494.1 kPa

3 0
2 years ago
Try It: Evidence of Population Change
erma4kov [3.2K]
The answer to this would be false.
4 0
3 years ago
Please help me with this basic organic conversion.<br>use the shortest way to do it​
jonny [76]

Answer:

See explanation

Explanation:

This conversion must go through a sequence of steps as i have shown in the image attached to this answer.

The acetone is converted to propan-2-ol using LiAlH4, THF and acid. The  propan-2-ol may be converted to propene by E2 elimination. Addition of HBr yields 2-bromo propane.

The Wurtz reaction converts 2-bromo propane to 2,3- dimethyl butane. This can be brominated in the presence of light to yield 3-bromo-2,3-dimethyl butane. Elimination of HBr using a base leads to the formation of the required product as shown.

7 0
2 years ago
Sometimes described as a "chemical brother" of gaba (gamma-aminobutyric acid), which amino acid neurotransmitter acts in an exci
poizon [28]

excitatory amino acids are the amino acids helps in transformation of neurotransmitters or it helps in transmission of synapsis rapidly in brain of mammal. EAA known to be neurotransmitters for Central nervous system.

Excitatory amino acids count may vary from 50’s to 100’s. They are mostly composed of non-protein- amino acids obtained from algae or fungi.

The possible EAAs are Glutamate (Glu) and Aspartate which act as excitatory neurotransmitters in the brain. They get released from neurons where they induce excitation via metabotropic Glu receptors.  

Both glutamate and aspartate having excitatory effect on neurotransmission whereas Gama-amino butyric acid having inhibitory effect on neurotransmission.

Thus, the statement ‘neurotransmitters are chemical brother of gaba’ is indicating the complementary effect of each other.


4 0
3 years ago
ILL GIVE U BRAINILIEST
Arte-miy333 [17]
1:3 hope DAT helps #ZedTheZom
5 0
3 years ago
Other questions:
  • Is there any place on Earth that does not have seasons?
    6·2 answers
  • Which of these organisms is most likely 50 meters in size?
    9·2 answers
  • What is the molar mass of Ca(NO3)2
    15·2 answers
  • How is a slump different from creep?
    11·1 answer
  • Is the reaction balanced?
    13·1 answer
  • Which two elements are combined in sodium chloride
    9·2 answers
  • An atom has 9 protons and 7 electrons. What is its overall charge?
    6·1 answer
  • In a bond Between fluorine and bromine which direction will the bond dipole point?
    14·1 answer
  • Excessive use of fertilizers make soil unfertile. true or false​
    9·2 answers
  • Which structure is not an isomer of pentane and state why?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!