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
nirvana33 [79]
2 years ago
9

Which best explains why changes to the atomic theory were necessary? (2 points)

Chemistry
2 answers:
RSB [31]2 years ago
5 0
It would be the first two because 3 and 4 are irrelevant to the atomic theory :)
STALIN [3.7K]2 years ago
3 0
The answer is A because every ones theory cant be the same

You might be interested in
How many atoms are in 5 mole of water?<br> Steps
Vladimir79 [104]

Answer: 3.01 x 10^24 atoms

Explanation:

Based on Avogadro's law:

1 mole of any substance has 6.02 x 10^23 atoms

So, 1 mole of water = 6.02 x 10^23 atoms

5 moles of water = Z atoms

To get the value of Z, cross multiply

Z x 1 mole = (6.02 x 10^23 atoms x 5 moles)

Z•mole = 30.1 x 10^23 atoms•mole

Divide both sides by 1 mole

Z•mole/1 mole = 30.1 x 10^23 atoms•mole/ 1 mole

Z = 30.1 x 10^23 atoms

[Place the value of Z in standard form]

Z = 3.01 x 10^24 atoms

Thus, there are 3.01 x 10^24 atoms in 5 mole of water

3 0
2 years ago
If you are studying cells and heredity bwhat classes are u in
ValentinkaMS [17]
Probably life science or biology.
3 0
2 years ago
How might cancer of the testes affect a man's ability to make sperm
evablogger [386]
<span>It might affect that by making the testes grow uncontrollably so it can't make

</span>
3 0
2 years ago
Compared to a 0.1 M aqueous solution of NaCl, a 0.8 M aqueous solution of NaCl has a
Fudgin [204]
The correct answer is option 2. A 0.8 M aqueous solution of NaCl has a higher boiling point and a lower freezing point than a 0.1 M aqueous solution of NaCl. This is explained by the colligative properties of solutions. For the two properties mentioned, the equation for the calculation of the depression and the elevation is expressed as: ΔT = -Km and <span>ΔT = Km, respectively. As we can see, concentration and the change in the property has a direct relationship.</span>
3 0
3 years ago
Which elements make up 95 percent (by weight) of the human body?
Alex17521 [72]
Oxygen,carbon,hydrogen,and nitrogen- together make up 95 percent of the mass of the human body.
Hope this helps.
3 0
2 years ago
Other questions:
  • How does the matter and (solar) energy move through the sphere? (Atmosphere)
    14·1 answer
  • Suppose a thermometer has marks at every one degree increment and the mercury level on the thermometer is exactly between the 25
    6·1 answer
  • Uranium-238 decays to Lead-206. Both Rock X and Rock Y initially had a ratio of 100%. Uranium-238 to 0% Lead-206. Today, Rock X
    12·1 answer
  • Which of the following readings is used to determine the availability of minerals
    8·1 answer
  • What happens to the average kinetic energy of the molecules of a warm substance when the temperature of the substance is slightl
    9·2 answers
  • Which of the following reactions involves two or more substances combining to form a new compound?
    9·1 answer
  • Table C: Known Specific Heat Values for Common
    8·2 answers
  • Which subatomic particles contribute to an atom's mass number but not its atomic number
    11·1 answer
  • Antacid has a pH of 11. What does that tell you about its concentration of hydrogen ions? What does that tell you about its conc
    15·1 answer
  • The km of an enzyme is 5. 0 mm. Calculate the substrate concentration when this enzyme operates at one‑quarter of its maximum ra
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!