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
wel
3 years ago
12

An atomic scientist was studying an atom and through experimentation found that the total negative charge of the area surroundin

g the nucleus is -9. Which statement correctly describes this atom?
This atom has nine clouds.
This atom has nine electrons.
This atom has nine neutrons.
This atom has nine protons.
Chemistry
1 answer:
Studentka2010 [4]3 years ago
5 0

Answer:

This atom has nine electrons

You might be interested in
Which of these cause the build up of volcanic landforms?
finlep [7]
D. ash, cinder, and lava
6 0
2 years ago
Read 2 more answers
How many moles of electrons is required to deposit 5.6g of iron from a solution of iron (2) tetraoxosulphate(6)
yuradex [85]

Answer:

0.20 mol

Explanation:

Let's consider the reduction of iron from an aqueous solution of iron (II).

Fe²⁺ + 2 e⁻ ⇒ Fe

The molar mass of Fe is 55.85 g/mol. The moles corresponding to 5.6 g of Fe are:

5.6 g × 1 mol/55.85 g = 0.10 mol

2 moles of electrons are required to deposit 1 mole of Fe. The moles of electrons required to deposit 0.10 moles of Fe are

0.10 mol Fe × 2 mol e⁻/1 mol Fe = 0.20 mol e⁻

7 0
3 years ago
An abandoned Indiana coal mine spoil bank (wastes) contains chunks of pyrite minerals. Under constant erosion and weathering, th
Minchanka [31]

Answer:

The acid will be neutralized overtime

Explanation:

The presence of the pyrites leads to the leaching of large amounts of sulphuric acid, however the basic carbonates neutralizes the acid according to the reaction equation;

CaCO3 + H2SO4 ---> CaSO4 + CO2 + H2O.

This will prevent all the deleterious consequences associated with the leaching of the acid in the abandoned coal mine.

7 0
3 years ago
exactly 1mol of n2o4 is placed in an empty 1 l container. if at equilibrium n2o4 is dissociated 20%, what is the value of equili
egoroff_w [7]

Answer:

K = 0.2

Explanation:

Based on the chemical dissociation of N₂O₄:

N₂O₄ ⇄ 2NO₂

The equilibrium constant, K, of the reaction is:

K = [NO₂]² / [N₂O₄]

Now, if 20% of N₂O₄ is dissociated, 80% remains as N₂O₄ = 0.8mol/L = 0.8M

as 20% is dissociated, 0.2moles of N₂O₄ were dissociated and 0.2*2 = 0.4mol/L of NO₂ are produced.

Replacing in K:

K = [0.4M]² / [0.8M]

<h3>K = 0.2</h3>
5 0
3 years ago
List a few of the physical properties of buckyball
stepladder [879]

Buckyball or buckminster fullerene is the third allotrope of carbon. It contains 60 carbons which are arranged in the five and six membered rings. Buckyball is the cluster of carbon atoms which are arranged in spherical shape and it forms a hollow cage.

The physical properties are:

Buckyball is made up of huge number of molecules but giant covalent bond is not exist.

The forces between the individual buckyballs are weak intermolecular forces.

The substances which are made up of buckyballs has low melting point in comparison to other allotropes of carbon as low energy is required to overcome theses intermolecular forces.

The substances which are made up of buckyballs is slippery in nature.

The solutions of buckminster fullerene are deep purple in color and upon evaporation brown residue is obtained.

Buckyball is soft in comparison to graphite and when it is compressed to less than 70 percent of its volume then, it converts into superhard form of diamond.







7 0
3 years ago
Other questions:
  • What is the resultant displacement?
    9·1 answer
  • Mary wanted to determine which type of fertilizer would help her plants grow taller. She got 16 plant pots andd scooped 2 cups o
    8·1 answer
  • In any chemical compound, the elements are always combined in the same proportion by ___. A. charge B. mass C. volume D. density
    8·1 answer
  • Use the following reaction:
    5·2 answers
  • Написати 4 пункта +до кожного приклад
    8·1 answer
  • What is creation in terms of chemical reactions?
    9·1 answer
  • What does a virus inject into a cell?
    7·1 answer
  • Katie's teacher has asked her to identify an unknown
    11·1 answer
  • 4.6 x 105<br> How many significant figures?
    11·1 answer
  • Select the correct answer. A solution with 117 grams of lithium hydroxide and another with 141 grams of hydrogen bromide are com
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!