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tamaranim1 [39]
3 years ago
11

Explain the difference between the bohr model and the electron cloud model

Chemistry
1 answer:
Vesnalui [34]3 years ago
4 0

Answer:

An electron cloud model is different from the older Bohr atomic model by Niels Bohr. Bohr talked aboutelectrons orbiting the nucleus. ... Theelectron cloud model says that we cannot know exactly where an electron is at any given time, but the electronsare more likely to be in specific areas.

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What is the molecular weight (rmm) of NaOH?<br> 40<br> 20<br> 50<br> 60
Molodets [167]

Answer: A/40 it is actually 39.997 but since that is not an answer they rounded up

Explanation:

4 0
2 years ago
In each reaction box, place the best reagent from the list below. draw the intermediate compound.
Fynjy0 [20]

Answer:

Reagent A: PBr₃

Reagent B: Mg in Et₂O.

Explanation:

Hello,

In this case, your facing a problem in which a carboxylic acid is produced starting by an alcohol. More specifically, cyclopentanol must react with phosphorous tribromide in order to yield bromocyclopentane which is more likely to produce a carboxylic acid, therefore, reagent A is PBr₃.

On the other hand, by means of the production of the specified product, bromocyclopentane must react with carbon dioxide and magnesium in diethyl ether in acidic media to promote the production of the cyclopentanoic acid via the grignard reaction (substitution of the bromine by the carboxyle group), therefore, reagent B is Mg in Et₂O.

Best regards.

8 0
3 years ago
How many moles of neon atoms are there in a neon sign that has 2.4 * 20^ 24 atoms of neon? *
Whitepunk [10]

Answer:

4 moles of neon

Explanation:

Given data:

Number of moles of neon = ?

Number of atoms of neon = 2.4×10²⁴ atoms

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen

For given neon atoms:

1 mol =  6.022 × 10²³ atoms

2.4×10²⁴ atoms × 1 mol / 6.022 × 10²³ atoms

0.4×10¹ mol = 4 mol

3 0
3 years ago
A chemical reaction happens
Art [367]
B I think lol when something changes the state of matter
5 0
3 years ago
The specific heat of a certain type of metal is 0.128j/(g.c). What is the final temperature if 305.J of heat is added to 72.7g o
expeople1 [14]
E answer is -60.57 = -60.6 KJ.
CaC2(s) + 2 H2O(l) ---&gt; Ca(OH)2(s) +C2H2(g) H= -127.2 KJ
Hf C2H2 = 226.77
Hf Ca(OH)2 = -986.2
<span>Hf H2O = -285.83
Now,

</span><span>add them up. 226.77 - 986.2 + (2*285.83) = -187.77 
</span><span>Add back the total enthalpy that is given in the question
 -187.77+127.2 = -60.57 

</span>
3 0
3 years ago
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