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igomit [66]
3 years ago
12

in the reaction 3H2+N2--> NH3,what coefficient should be placed in front of NH3 to balance the reaction?

Chemistry
2 answers:
VikaD [51]3 years ago
8 0
The best way to solve this is to list all the elements out and count them.

Count subscripts first (if there is no subscript then there is 1 atom)
Then multiply by the coefficients
To balance write a coefficient and multiply

<span>3H2+N2--> NH3

H 2 x 3 = 6                H  3  (x2) = 6
N 2                            N  1  (x2) = 2


Your answer is 2 . . . to balance this equation you will need a coefficient of 2</span>
alexira [117]3 years ago
3 0

Answer:

2

Explanation:

To balance the equation there must be the same numbers of atoms at the left side and at the right side. So, at the left side we have:

  6 atoms of H (3 x 2)

  2 atoms of N (1 x 2)

And at the right side we have:

  1 atom of N (1 x 1)

  3 atoms of HN (1 x 3)

If you multiply these last by 2, you will have:

  2 atoms of N (2 x 1)

  6 atoms of H (2 x 3)

Then, the numbers of atoms of H and N at the left side is equal to the numbers of atoms of H and N at the right side. The balanced equation is:

3H2+N2--> 2NH3

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aleksklad [387]

14. a. Acidic

15. b. Weaker

16. d. Dilute and weak

Explanation:

14. Which type of the solution is one with the pH of 3?

Solution with pH from 1 to 7 are acidic, equal to 7 is neutral and from 7 to 14 basic. The solution with the pH equal to 3 is <u>acidic</u>.

15. The smaller the value of the base dissociation constant (Kb), the <u>weaker</u> the base.

The dissociation reaction of a base (B) is:

B + H₂O → BH⁺ + OH⁻

Kb is defined as:

Kb = ( [BH⁺] × [OH⁻] ) / ( [B] × [H₂O] )

The potency of the base depends on the concentration of the hydroxide ion [OH⁻], so if the Kb ratio is small it means that the concentration of hydroxide ion is smaller so the base will be <u>weaker</u>.

16. A 0.39 M solution of an acid that ionizes only slightly in solution would be termed <u>dilute and weak</u>.

The acid is weak because is only slightly ionizing in solution. The therm diluted is a little bit arbitrarily because we ask yourself "diluted in respect with what"? I would characterize the acid to be diluted at a concentration of 1 M and concentrated at a concentration of 10 M.

Learn more about:

pH

brainly.com/question/1402522

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8 0
3 years ago
Oxidation/reduction (redox) reactions like this: 2H2(g) + O2(g) ⇒ 2H2O(l) will occur spontaneously. To make the reaction proceed
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Artist 52 [7]

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6 0
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