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sveta [45]
3 years ago
13

True or false: An element has two layers of electrons. The electrons in the outermost layer are called distance electrons.

Chemistry
2 answers:
valentinak56 [21]3 years ago
3 0

Answer:

true

Explanation:

masya89 [10]3 years ago
3 0
The answer is True, do you need to know the reason behind why it’s true?
You might be interested in
Calculate the mass of water produced when 4.86 g of butane reacts with excess oxygen.
Black_prince [1.1K]
The mass  of water  produced  when  4.86 g  of  butane(C4H10)   react  with  excess oxygen  is  calculated  as below

calculate  the  moles of  C4H10 used = mass/molar mass

moles = 4.86g/58  g/mol =0.0838  moles
write a balanced equation   for  reaction

2 C4H10  + 13 O2 =  8 CO2  + 10 H2O
by use of mole   ratio between C4H10  to H2O  which is   2:10  the  moles  of
H20=  0.0838  x10/2 = 0.419  moles  of  H2O

mass = moles  x  molar mass

=0.419 molx  18  g/mol  =  7.542 grams of water  is  formed

6 0
3 years ago
There is a part A and B
ladessa [460]

Answer:

Im so confused, and maybe blind bcs I cant read it

Explanation:

Could you explain??

3 0
3 years ago
Read 2 more answers
Please help<br><br> SOS<br><br> and explain please if you know how
vfiekz [6]

Answer:

<h2>1 N2+ 1 O2 are two N atoms and two O atoms.</h2>

<h3>In NO, there is one N and one O atom.</h3>

For both sides to be the same, there have to be 2 NO molecules, as 2 NO molecules contain 2 N atoms and 2 O atoms, just like starting products of the reaction.

8 0
3 years ago
How many grams of iron metal do you expect to be produced when 305 grams of a 75.5 percent by mass iron(II) nitrate solution rea
lutik1710 [3]
The balanced chemical reaction is:

<span>2 Al (s) + 3 Fe(NO3)2 (aq) = 3 Fe (s) + 2 Al(NO3)2 (aq)
</span>
The ratios or the coefficients between the reactants and the products will be used for further calculations.

305 g Fe(NO3)2 solution (.755) = 230.275 g <span>Fe(NO3)2

</span> 230.275 g Fe(NO3)2 ( 1mol / 179.87 g) ( 3 mol Fe / 3 mol <span>Fe(NO3)2) ( 55.85 g / mol) = 71.500 g Fe</span>
4 0
3 years ago
Read 2 more answers
An unknown compound contains only C , H , and O . Combustion of 5.90 g of this compound produced 11.8 g CO2 and 4.83 g H2O . Wha
Mamont248 [21]

Answer:

C₂H₄O

Explanation:

In a compound that contains Cabon, hydrogen and oxygen, the combustion produce CO₂ from the carbon, and H₂O from the hydrogens. Using the mass of the products we can solve the moles of Carbon and hydrogen. The empirical formula is the simplest whole-number of atoms present in a molecule.

<em>Moles CO₂ = Moles C:</em>

11.8g CO₂ * (1mol / 44g) = 0.268 moles CO₂ = 0.268 moles C * (12g/mol) =

3.216g C

<em>Moles H₂O = 1/2 moles H:</em>

4.83g H₂O * (1mol / 18g) = 0.268 moles H₂O * (2 mol H / 1 mol H₂O) =

0.537 mol H * (1g/mol) = 0.537g H

<em>Mass O to find moles O:</em>

5.90g Sample - 3.216g C - 0.537g H = 2.147g O * (1mol / 16g) = 0.134 moles O

<em>Ratio of atoms -Dividing in 0.134 moles-:</em>

C = 0.268mol C / 0.134 mol O = 2

H = 0.537mol H / 0.134 mol O = 4

O = 0.134mol O / 0.134 mol O = 1

Empirical formula is:

<h3>C₂H₄O</h3>

7 0
3 years ago
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