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Effectus [21]
2 years ago
12

You start with 100mL of 14M HNO3 and 10grams of copper metal. How many moles of the nitrogen dioxide gas will be produced?

Chemistry
1 answer:
givi [52]2 years ago
7 0

Answer:

0.316 moles are produced.

Explanation:

We state the redox reaction:

4HNO₃   + Cu   →  Cu(NO₃)₂ + 2NO₂ + 2H₂O

We need to determine the limting reactant:

0.1 L . 14 M = 1.4 moles

10 g . 1mol/ 63.54g =0.158 mol

Cu is the limiting reactant. Let's see

4 moles of acid need 1 mol of Cu to react

1.4 moles of acid may react to (4 . 1) / 1.4 = 0.35 moles

We do not have enough Cu.

1 mol of Cu can produce 1 mol of NO₂

Then 0.158 moles will produce, 0.316 moles. (double of moles)

If we see stoichiometry, ratio is 1:2

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Given the balanced equation representing a reaction:
GrogVix [38]
 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















6 0
3 years ago
Read 2 more answers
When determining the formula for a compound, it is important to know the valence numbers of each element. Suppose you want to wr
Damm [24]

Explanation:

The valency of the element is the measure of the combining power of the element with the other atoms when the element forms compounds or molecules.

<u>Thus, valency has to known to find the how the elements have been combined and how many electrons have been lost, gain or shared.</u>

Given that:

Element A has 3 valence electrons and element B has 2 valence electrons. To find the ionic compound, the valency of the cations and the anions are interchanged and are written in subscripts. Thus,

A        B

3          2

Cross multiplying, we get the formula : A_2B_3

<u>Hence, 3 is the subscript for Element B.</u>

3 0
3 years ago
As the elements of group 16 (VIA) are considered from top to bottom on the Periodic Table, the atomic radii
mina [271]
For group 16 elements, the atomic radii increases  down the group as a shell of electron is added on each time.
4 0
3 years ago
How many moles of H2O will be formed from the reaction of 80 g of
Roman55 [17]

Answer: 2 moles of H_2O will be formed.

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}    

\text{Moles of} NaOH=\frac{80g}{40g/mol}=2moles

The balanced chemical equation is:

H_2SO_4+2NaOH\rightarrow Na_2SO_4+2H_2O

According to stoichiometry :

2 moles of NaOH give = 2 moles of H_2O

Thus 2 moles of NaOH give =\frac{2}{2}\times 2=2moles of H_2O

Thus 2 moles of H_2O will be formed.

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Suppose you held a lighted match to a solid hunk of wood and another match to a pile of wood shavings. Which form of wood will c
Reptile [31]

Answer:

Wood

Explanation:

0 0
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