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
Arlecino [84]
3 years ago
12

After 1911, most scientists accepted the theory that the nucleus of an atom was very dense and very small and had a positive cha

rge. What led scientist to accept this theory?
A) Dalton’s theory of the atom was over 100 years old

B) Scientists before 1911 used the scientific method of inquiry improperly

C) A new model proved that the quantum theory of the atom was inaccurate

D) Rutherford did an experiment firing alpha particles at a thin piece of gold foil
Chemistry
1 answer:
Scorpion4ik [409]3 years ago
4 0

Answer:

I believe it is D

Explanation:

since Rutherford's explanation, when he made it in 1911, was that scattering was caused by a hard, dense court to centre of the Adam, which is the nucleus and he used Alpha particles to observe the scattered backwards from a gold foil

You might be interested in
Help PlS AFAP and thank you so much
Triss [41]

Answer:

B

Explanation:

idk how to explain, B is the definition of conduction

8 0
3 years ago
Read 2 more answers
200.0 mL of 3.85 M HCl is added to 100.0 mL of 4.6 M barium hydroxide. The reaction goes to completion. What is the concentratio
Ede4ka [16]

Answer:

2.387 mol/L

Explanation:

The reaction that takes place is:

  • 2HCl + Ba(OH)₂ → BaCl₂ + 2H₂O

First we <u>calculate how many moles of each reagent were added</u>:

  • HCl ⇒ 200.0 mL * 3.85 M = 203.85 mmol HCl
  • Ba(OH)₂ ⇒ 100.0 mL * 4.6 M = 460 mmol Ba(OH)₂

460 mmol of Ba(OH)₂ would react completely with (2*460) 920 mmol of HCl. There are not as many mmoles of HCl so Ba(OH)₂ will remain in excess.

Now we <u>calculate how many moles of Ba(OH)₂ reacted</u>, by c<em>onverting the total number of HCl moles to Ba(OH)₂ moles</em>:

  • 203.85 mmol HCl * \frac{1mmolBa(OH)_{2}}{2mmolHCl}= 101.925 mmol Ba(OH)₂

This means the remaining Ba(OH)₂ is:

  • 460 mmol - 101.925 mmol = 358.075 mmoles Ba(OH)₂

There are two OH⁻ moles per Ba(OH)₂ mol:

  • OH⁻ moles = 2 * 358.075 = 716.15 mmol OH⁻

Finally we <u>divide the number of OH⁻ moles by the </u><u><em>total</em></u><u> volume</u> (100 mL + 200 mL):

  • 716.15 mmol OH⁻ / 300.0 mL = 2.387 M

So the answer is 2.387 mol/L

7 0
3 years ago
Color is not very helpful in mineral identification because _____.
zhannawk [14.2K]
Some minerals tend to look alike.
8 0
3 years ago
Read 2 more answers
Radioactive elements include all those elements whose nuclei contain more than
andrey2020 [161]
Bbgfbsthgbdvdge fr that’s crazy d. Thx
6 0
3 years ago
How many moles in 250g of CBr 4
EleoNora [17]

Answer:

fzdfxbgfdgbfbfggf

Explanation: fregrgsrg5

7 0
3 years ago
Other questions:
  • Beryllium is a rare metal that is gray in color, strong, and lightweight. The following data was obtained from a calorimeter exp
    6·2 answers
  • How do you use the changes in the phase of water to keep you cool?
    6·1 answer
  • Which of the following is the most likely sign that a chemical change has happened?
    12·1 answer
  • 1)Explain why the overall charge of a nucleus positive ?
    13·1 answer
  • When a reaction between Magnesium and Hydrochloric acid take place the mass of the reactants is more than the mass of the produc
    8·1 answer
  • Base changes phenolphthalein to pink it is true or false​
    9·2 answers
  • HELP ASAP!! is this the correct answer!
    14·2 answers
  • A scuba diver knows that she needs 50.0mol of air for an upcoming dive. What size (volume) tank will she need to fill for this d
    13·1 answer
  • The mass number of 3 isotopes of magnesium are 24,25,26.what is the mass number of the most abundant isotope of magnesium.​
    7·1 answer
  • What is the temperature of 0.750 mol of a gas stored in a 6,050 mL cylinder al 221 atm?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!