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Scilla [17]
2 years ago
13

Given the balanced equation representing a reaction:

Chemistry
2 answers:
GrogVix [38]2 years ago
6 0
 As  aluminium   loses 12 moles  of electrons  oxygen   gain  12 moles of electrons.

Explanation
  4Al +  3 O2→ Al2O3
  first write the ions of  Aluminium  and  oxygen

that is, Aluminium  ion is = Al^3+
              oxygen   ion  is =  O^2-
therefore  one  atom  of Al   loses   3  electrons  moles  while
                one atom of  O gain  2  electrons  moles
                
from equation above there  a total of number of Al atom are 4 =( 1 x4=4)  atoms   while
                                                Oxygen atoms  are  6= ( 3 x2=6) atoms
 
therefore the total  number of Moles of Al lost is = 3  x 4 = 12 moles of                       electrons
     

  total  number of moles of O gained  =  2 x6 = 12 moles  of electrons















Mamont248 [21]2 years ago
3 0
Base on the question, which of the following that sates the balance of the reaction and as the aluminum loses 12 moles of electrons, what could be the oxygen, and base on my research, the possible answer among them is in number (2) gains 12 moles of electrons, I hope you are satisfied with my answer and feel free to ask for more 
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A person weighed 15 pennies on a balance and recorded the following masses:
Artist 52 [7]

Answer:

A)  yes

B) The average mass of 12 pennies should be expressed as

( 3.131 + 3.129 + -------- X12 ) g /  12

where X12 = is the mass of the 12th penny

Explanation:

A) I think the the Bureau of Mint changed the way it made pennies because from the experiment and observation carried out on 15 different pennies it can be seen that they had different weights and this difference is associated with the period/time of production of the different pennies,

B ) The average mass of any object should be expressed in the si unit of mass and not having ($) sign attached to the value instead it should be expressed in grams or kilograms (s.i unit of mass )

The average mass of 12 pennies should be expressed as

( 3.131 + 3.129 + -------- X12 ) g /  12

where X12 = is the mass of the 12th penny

4 0
3 years ago
Calculate the number of moles of ethanol acid in 30 cm³of 1 mol dm-³ solution ​
muminat

Answer:

May I assume "ethanol acid is just ethanol (it has one slightly acidic H atom).  If so, the molar mass is 46.02 g/mole.

Explanation:

We have 30 cm^3 [30 ml] of 1.0 M (1 mole/liter)  [1 dm³ = 1 liter].

That is 1 mole/liter.  30 ml would contain (0.030 liter)*(1 mole/1 liter) = 0.03 moles.

7 0
3 years ago
How does the periodic table help I’m predicting the formula of a stable ionic compound
WITCHER [35]
The answer is B on edge


4 0
3 years ago
Mr. Swerdlow wrote a chemical equation on the board and asked his class what should be changed to make it correct. He wrote:
Misha Larkins [42]

Answer is: 3. Water and carbon dioxide should both be moved to the products side, and glucose and oxygen should be moved to the reactants side.

Balanced chemical reaction for cellular respiration (convert biochemical energy):

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy, or:

glucose + oxygen → carbon dioxide + water + energy.

This reaction is exothermic (energy is released).

6 0
3 years ago
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Which of the following methods could be used in a scientific investigation?
eimsori [14]

Answer:

its all of them ✨

Explanation:

i idk why there its all of them tho i promise you

8 0
2 years ago
Read 2 more answers
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