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
valkas [14]
4 years ago
7

Which prediction about a methane molecule would most likely be made by using both the quantum model of the atom and John Dalton'

s model?
Chemistry
1 answer:
jeyben [28]4 years ago
4 0

Answer. Methane molecule is made up of five atoms; four of hydrogen and one of carbon. Carbon atom is sharing its 4 valence electrons with 4 hydrogen atoms each having 1 electron.

Explanation:

Dalton model of atom said that the matter is made up of smallest indivisible particle that is an atom. From which he predicted that methane molecule will be made up one carbon atom and 4 hydrogen atoms.

Quantum model of atom described the structure of atom with the help of four quantum numbers. These number explained the position, magnetic character and spin of electrons  inside the atom. and further explained the sharing of electron between one one carbon and 4 hydrogen atoms.

Hence from these two models we can predict that methane molecule is made up atoms with sharing of electrons.


You might be interested in
Why is it easier to switch to solar and wind energy as compared to other alternative energy sources? Select all that apply.
hammer [34]

Answer:C. They can be produced easily in areas with geothermal activity.

D. The land can be used for other purposes while supplying energy.

Explanation:

Both c and d are correct

4 0
3 years ago
Why aren't ALL farms hydroponic?
marusya05 [52]

Answer:

Because all farms cant afford it... im not sure if this is the answer your lookin for but if it aint lmk and ill delete my answer

Explanation:

8 0
4 years ago
What is the coordination number of an atom in FFC unit ?<br><img src="https://tex.z-dn.net/?f=%20%5C%5C%20" id="TexFormula1" tit
valina [46]
Hey there!

The Coordination number of an atom in FCC unit is 12.

FCC means Face centred cubic structure.

Have a good day.
6 0
3 years ago
Read 2 more answers
Aspirin (C9H8O4) is synthesized by reacting salicylic acid (C7H6O3) with acetic anhydride (C4H6O3). The balanced equation isC7H6
prisoha [69]

<u>Answer:</u>

<u>For a:</u> The mass of acetic anhydride needed is 73.91 grams.

<u>For b:</u> The theoretical yield of aspirin is 130.43 grams.

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}   .....(1)

  • <u>For a:</u>

Given mass of salicylic acid = 1.00\times 10^2g=100g

Molar mass of salicylic acid = 138.121 g/mol

Putting values in equation 1, we get:

\text{Moles of salicylic acid}=\frac{100g}{138.121g/mol}=0.724mol

For the given chemical reaction:

C_7H_6O_3+C_4H_6O_3\rightarrow C_9H_8O_4+CH_3COOH

By stoichiometry of the reaction:

1 mole of salicylic acid reacts with 1 mole of acetic anhydride.

So, 0.724 moles of salicylic acid will react with = \frac{1}{1}\times 0.724=0.724mol of acetic anhydride.

Now, to calculate the mass of acetic anhydride, we use equation 1:

Moles of acetic anhydride = 0.724 moles

Molar mass of acetic anhydride = 102.09 g/mol

Putting values in equation 1, we get:

0.724mol=\frac{\text{Mass of acetic anhydride}}{102.09g/mol}\\\\\text{Mass of acetic anhydride}=73.91g

Hence, the mass of acetic anhydride needed is 73.91 grams.

  • <u>For b:</u>

By stoichiometry of the reaction:

1 mole of salicylic acid is producing 1 mole of aspirin.

So, 0.724 moles of salicylic acid will produce = \frac{1}{1}\times 0.724=0.724mol of aspirin.

Now, to calculate the mass of aspirin, we use equation 1:

Moles of aspirin = 0.724 moles

Molar mass of aspirin = 180.158 g/mol

Putting values in equation 1, we get:

0.724mol=\frac{\text{Mass of aspirin}}{180.158g/mol}\\\\\text{Mass of aspirin}=130.43g

Hence, the theoretical yield of aspirin is 130.43 grams.

4 0
4 years ago
Which of the following does not involve colligative properties?
fomenos
Colligative properties are usually used in relation to solutions.
Colligative properties are those properties of solutions, which depend on the concentration of the solutes [molecules, ions, etc.] in the solutions and not on the chemical nature of those chemical species. Examples of colligative properties include: vapour pressure depression, boiling point elevation, osmotic pressure, freezing point depression, etc. 
For the question given above, the correct option is D. This is because the statement is talking about freezing point elevation, which is not part of colligative properties.
7 0
4 years ago
Read 2 more answers
Other questions:
  • Write the full ground state electron configuration of co3+ in abbreviated form
    13·1 answer
  • Enzymes are proteins that speed up chemical reactions in the body. How do they work?
    9·1 answer
  • What is the difference between constitutional isomers and confirmational isomers?
    5·1 answer
  • Plant use sunlight as energy to convert carbon dioxide and water into glucose and oxygen. Which best describes the reaction?
    10·2 answers
  • If we added heat (Q) to the, and we knew this resulted in an increase of internal energy (U) of + 15, what would the change in w
    5·1 answer
  • Please help!! I was sick when he went over this
    7·1 answer
  • How does human consumption of limited resources (energy), impact the biosphere?
    11·1 answer
  • How can you tell, from the drawings, that gravity is greater on Earth
    8·2 answers
  • The box in the above picture is falling from the top of a building to the ground. Two major forces are acting on the box as it f
    15·2 answers
  • 1-3 gas stoichiometry! please help and put in steps in every problem. please help if u can​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!