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stealth61 [152]
3 years ago
10

What is the highest electronegativity value in the periodic table?

Chemistry
1 answer:
xenn [34]3 years ago
6 0
The element with the most electronegativity is Fluorine and it is 3.98
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How many molecules are present in 187 grams of XeF4
PtichkaEL [24]

There are 5.43 x 10²³ present in  187 grams of XeF₄

<h3>Further explanation  </h3>

The mole is the number of particles(molecules, atoms, ions) contained in a substance  

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

Moles can also be determined from the amount of substance mass and its molar mass

\tt n(mol)=\dfrac{mass(m)}{MW}

mass of XeF₄ = 187 g

mol XeF₄ (MW=207,2836 g/mol) :

\tt mol=\dfrac{187}{207,2836 g/mol}=0.902

Number of molecules :

\tt N=0.902\times 6.02\times 10^{23}\\\\N=5.43\times 10^{23}

4 0
3 years ago
How many oxygen atoms are present in 22.6 grams of sulfur trioxide (SO,)?<br> (Show work)
s2008m [1.1K]

Answer:

Well,

3

×

N

A

oxygen atoms..

Explanation:

Where

N

A

≡

Avogadro's number

≡

6.022

×

10

23

⋅

m

o

l

−

1

.

And so if wl1

oxygen atoms...

i.e.

18.066×

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8 0
2 years ago
An 18-g sample of element A combines completely with a 4-g sample of element B to form the compound AB. What is the mass of the
DaniilM [7]

Answer:

22g

Explanation:

Given parameters:

Mass of element A = 18g

Mass of element B  = 4g

Unknown:

Mass of compound formed = ?

Solution:

 The reaction equation is given as;

          A   +   B   →  AB

According to the law of conservation of mass "in a chemical reaction, matter is neither created nor destroyed but changed from one form to another".

Simply mas is conserved and the mass of the reactants is the same as the mass of the product that forms.

  Mass of reactants  = mass of A + mass of B = 18g + 4g  = 22g

 So;

  Mass of product AB = 22g

6 0
2 years ago
What are some problems and solutions to sending a human to jupiter
Ray Of Light [21]
The problem with sending a human to jupiter would be the fact that Jupiter has a thing called the red spot which has alot of gravity. The rest of space does not have gravity so there is a natural pull.
4 0
3 years ago
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Which of the following substances is a chemical that is made only by<br> chemists?
Rainbow [258]

Answer:

theres nothing there

Explanation:

6 0
3 years ago
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