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
nata0808 [166]
3 years ago
6

Select the correct answer from each drop-down menu.

Chemistry
1 answer:
postnew [5]3 years ago
8 0

Answer:

Among the different types of scientific knowledge  hypotheses are likely to be modified or discarded most frequently. Long ago in the 1600's scientists discarded the phlogiston theory because the new evidence didnt support it.

Explanation:

Hypothesis is the assumption of something possible or impossible to draw a consequence and is provisionally established as the basis for an investigation and which can confirm or deny its validity. For this reason, within scientific research, hypotheses are so important and so changeable that they are modified or discarded more frequently within scientific knowledge.

Based on a work by Johann Joachim Becher, the German scientist Georg Ernst Stahl created the phlogiston theory that said combustion occurred with certain materials because they had an “element” or a common flammable principle that was released at the time of burning . This theory was abandoned because there was no evidence, even through scientific experiments, to prove that this theory is true.

You might be interested in
Explain why it is harder to remove an inner shell electrons than a valence electron from an atom
VMariaS [17]
<span> It makes sense that an inner shell electron would be tougher to remove than a valence electron because the inner shell electron is closer to the positive nucleus of the atom. Seeing as an electron caries a negative charge it would be too attracted to the positive core to leave readily. Also, the inner shell electrons are constantly repelling electrons outside of it's energy level (however the reason these electrons outside innershell energy levels don't simply fly away is the charge of the positive core overcomes the smaller charges of the comparably negligible inner shell electrons, but that repulsion is still there so keep that in mind) </span>
6 0
3 years ago
How can radioactivity be used to help find the age of an object ?
gogolik [260]

Hope this answers your question Mariaduong159

Radiometric Dating. It's used to find the dates of ricks and other objects based on what the known decay rate of radioactive isotopes. Different forms of this method can also estimate the age of natural and man-made materials.

8 0
3 years ago
How many moles are in 155 grams of aluminum
Aliun [14]

Answer:

wads

Explanation:

wadsdw

8 0
3 years ago
The less energy a wave has, the greater its amplitude. True or False
S_A_V [24]

Answer:

true

Explanation:

the more energy a wave has the greater the amplitude is

6 0
3 years ago
How many moles of hydrogen are needed to completely react with 2 moles of nitrogen
Natali5045456 [20]
Assuming ammonia is the product of this reaction:

N2+3H2--->2NH3

2 mole N2 * (3 mol H2)/(1 mol N2)= 6 mol H2

You would need 6 mol of hydrogen gas to completely react with 2 mol of nitrogen. 
5 0
3 years ago
Other questions:
  • Identify the conjugate acid-base pair in this balanced equation:<br> H2SO4 + 2NaOH → 2H2O + Na2SO4
    8·2 answers
  • Why does metal need to be extracted from an ore before it can be used?
    11·1 answer
  • What happens to the molecules of a liquid when it cools
    6·1 answer
  • Observe Record the appearance (colors,
    9·2 answers
  • Toluene (C7H8) and nitric acid (HNO3) are used in the production of trinitrotoluene (TNT, C7H5N3O6), an explosive. C7H8 + HNO3 =
    7·1 answer
  • Explain why science is is you significant digits
    13·1 answer
  • Ionic equation for Sr3(PO4)2 and its solubility product (Ksp)?​
    13·1 answer
  • Element does not contain any neutron in its nucles​
    5·1 answer
  • HAAAAAALP MEEEEEEEEEEE​
    14·1 answer
  • Write down a balanced chemical equation for a neutralizing reaction of a titration
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!