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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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The absorbance of a chlorophyll a standard solution in ethanol (density = 0.785 g/mL) is measured in
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Let <span>A= ebc </span>
<span>     0.765 = 86,300*1.3*c </span>
<span>
Solve for c = approximately 7E-6 Molar
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<span>g = 7E-6*893.49
   = about 0.006 g chlorophyll/L soln. </span>
<span>
1000 x 0.785 = 785 g ethanol. </span>
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<span>
Change that to ppm. by using formula:
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5 0
3 years ago
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in a combustion reaction at standard temperature and standard pressure,C2H6 reacts completely with 17.9 L of oxygen. what mass i
Liono4ka [1.6K]

Answer: 12.3 g H2O

Explanation: solution attached:

8 0
3 years ago
What is required in order to determine wether or not an object moves
Stels [109]

Answer:

The answer would be Point of Reference.

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(Hope this helps) Sky

7 0
3 years ago
Match the following items. Match the items in the left column to the items in the right column. 1. general or nonspecific observ
ivann1987 [24]
when column B is like the attached pic: (missing in your question)

so the matches will be like that:

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as Qualitative is a general or nonspecific observation, they also don't require

measurements and even can't be measured, that is because of the reality is

being approximated only. It  describes qualities and uses opinion

2- Hypothesis : 

as a hypothesis is an educated guess quantitative, and it is a prediction stated

in " If and then " form. a hypothesis to be valid need a research such as:

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as Quantitative is a measured observation, It's an information or data based

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5- Control :

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as a law is a statement that explains what something does under the same

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7 0
3 years ago
A sample of vinegar has a hydronium concentration of 1.6 × 10-3 M. What is the pH of the vinegar?
loris [4]
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So, the pH of given vinegar solution will be 2.8.

Therefore, the answer to this question is option B
3 0
3 years ago
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