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
bezimeni [28]
3 years ago
12

This scientist led a series of experiments that used high speed lightweight atoms called alpha particles to bombard very thin pi

eces of gold foil. Some of the alpha particles went straight through the foil, but a few alpha particles bounced back. The scientist used this information to hypothesize that an atom is made of a tiny dense nucleus surrounded by a region of mostly empty space.
A. Democritus
B. Ernest Rutherford
C. J.J Thomson
D. Archimedes
Chemistry
1 answer:
ss7ja [257]3 years ago
3 0

Answer:

B. Ernest Rutherford

Explanation:

Ernest Rutherford was a renown Physicist and a Physics Nobel price winner. In 1911 he proposed the planetary model of atom. When the experiment were conducted he proposed that the atom had a charged nucleus and are surrounded by electrons. This finding was the basis for subsequent studies on radioactivity.

You might be interested in
What element is undergoing oxidation in the following reaction?. . CH4(g) +2O2 (g) -> CO2(g) +2H2O(g). . . option . a) C. b)
SVETLANKA909090 [29]
The correct answer is a.) C. Oxidation occurs when an element loses electrons and increases its oxidation state. In the chemical equation, Carbon in CH4 has an oxidation state of 4- while Carbon in CO2 has an oxidation of 4+.
4 0
3 years ago
Read 2 more answers
Check all that apply.
White raven [17]

Answer:

4 for C in CH4

+4 for C in CO2

-2 for O in all substances

+1 for H in both CH4 and H2O

option 1,2,3 and 4 are correct. Option 5 is not correct

Explanation:

Step 1: Data given

Oxidation number of H = +1

Oxidation number of O = -2

Step 2: The balanced equation

CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)

Step 3: The oxidation numbers

-4 for C in CH4

 ⇒ Oxidation number of H = +1

    ⇒ 4x +1 = +4

C has an oxidation number of -4

This is correct.

+4 for C in CO2

 ⇒ Oxidation number of O = -2

    ⇒ 2x -2 = -4

C has an oxidation number of +4

This is correct.

-2 for O in all substances

⇒ this is correct, the oxidation number of O is always -2 (except in H2O2 and Na2O2)

This is correct.

+1 for H in both CH4 and H2O

⇒ this is correct, the oxidation number of H is always +1 (except in metal hydrides).

This is correct.

+4 for O in H2O

 ⇒ Oxidation number of H = +1

    ⇒ 2x +1 = +2

The oxidation number of O is -2

This is not correct

5 0
3 years ago
a student is asked to prepare 75.0 ml of a 130M solution of HF using a 2.000M standard solution. Calculate the volume in mL of 2
Blizzard [7]

Answer:

Volume required from standard solution = 4675 mL

Explanation:

Given data:

Final volume = 75.0 mL

Final molarity = 130 M

Molarity of standard solution = 2.000 M

Volume required from standard solution = ?

Solution:

We use the formula,

C₁V₁ = C₂V₂

here,

C₁ = Molarity of standard solution

V₁ = Volume required from standard solution

C₂ = Final molarity

V₂ = Final volume

Now we will put the values in formula,

C₁V₁ = C₂V₂

2.000 M × V₁ = 130 M × 75.0 mL

V₁  = 9750 M. mL / 2.000 M

V₁  = 4675 mL

5 0
4 years ago
6) Mr. Collins finally decided to take this seriously and put both hands on the rope and applied a 500 N force to the left,
natali 33 [55]

Answer:

I'm pretty sure the net force is 200 N and the direction of motion is left

Explanation:

500 - 300 = 200 and more force is coming from and pulling toward the left.

5 0
3 years ago
When turgor pressure is high enough in a cell, the cell walls become _____
iren2701 [21]

Answer:

the answer is "Firm".

Explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • Did I balance this correctly?
    9·1 answer
  • Driving cars lowers the ph of the oceans by what?
    11·2 answers
  • Bees use nectar from the flowers of plants as food. As they collect nectar, dustlike pollen grains stick to their body. When the
    8·2 answers
  • Reaction is
    9·1 answer
  • Calculate the number of moles of oxygen in a 16.3-L tank if the pressure is 331 kPa and the temperature is 197.4°C.
    8·1 answer
  • What happens to the coefficients in a reaction when writing the equilibrium constant expression?
    9·1 answer
  • Why does my dogs poop look green?
    15·1 answer
  • Fe2O3 + 3 Mg --> 2 Fe + 3 MgO reaction type
    10·1 answer
  • How many moles of C6H12O6 does 8.2 x 1023 molecules represent
    6·2 answers
  • This is due tomorrow so please help! : List 2 ways fluids and non fluids and DIFFERENT!
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!