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Lilit [14]
3 years ago
15

What is the oxidation number of nitrogen (N) in the compound HNO3?

Chemistry
2 answers:
Finger [1]3 years ago
5 0
Because there is no charge, the charge should add up to zero.
We know Oxygen always has an oxidation number of -2, however in this case there are 3 oxygen atoms. We know there are three oxygen atoms because it has the subscript of 3.
So 3x-2= -6

We also know the charge of Hydrogen (H) is always +1, there is only 1 hydrogen atom.
From here we can set up an equation to solve for Nitrogen, because we know it should add up to 0

So our equation is
H+O3+N=0

Next we plug in our values
1+-6+x=0
Then we solve for x by isolating it

So first subtract -6 from both sides
The equation is now 1+x=6

Then we'll subtract 1 from each side, leaving the equation as
x=5

So the oxidation number of N is +5
inn [45]3 years ago
5 0

Answer:

the answer for this would be B) +5

Explanation:

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Write 10,847,100 in Scientific Notation with 4 significant figures.
Lisa [10]

Answer:

The number 10,847,100 in Scientific Notation is 1.0847x10^{7}

Explanation:

Scientific notation is an easy form to write long numbers and it is commonly used in the scientific field. To write a long number in a shorter way it is necessary to 'move' the decimal point to the left the number of positions that are necessary until you get a unit. Then you write the number and multiplied it by 10 raised to the number of positions you moved the decimal point. In this case, it is necessary to move the decimal point 7 positions so, we multiply the number by 10 raised to 7.

5 0
3 years ago
How can you tell the difference between a mixture and a pure substance
xenn [34]
Mixtures are combinations of materials that can be separated by in most cases time. For instance, oil and water is a mixture. You can tell this by placing the two chemicals in a container and shaking them. They will mix and look like one substance, however, they will separate into the two liquids after some time is given. Assuming that "pure substance" is a solution, a substance is similar to a mixture, but the materials used in the solution are not separable. Over time the materials in the containing will not separate. I believe this is the answer you are looking for. 
8 0
3 years ago
____________ rays show areas where large quantities of energy are released.
sladkih [1.3K]

Answer:

Gamma

Explanation:

3 0
2 years ago
el diametro de la tierra en el ecuador es de 7926381 ml. redondee este numero a tres cifras significativas y expresel en notcion
elena55 [62]

7.93 x 10⁶mi

Explanation:

Significant figures are numbers that shows how accurate and precise scientific measurements are reported.

Here are some rules to identifying them;

  • All non-zero digits are significant
  • zeros between digits are significant
  • leading zero before a decimal are not significant
  • trailing zero after a decimal are significant
  • trailing zero before a decimal point are significant.

The number 7926381  has 7 significant numbers.

To write in the scientific notation, we simply express as N x 10ᵃ

   N is the number of significant number

   a is the exponent

N here is 7.93

a here is 6

            7.93 x 10⁶mi

learn more:

Significant figures brainly.com/question/2746374

#learnwithBrainly

7 0
3 years ago
This plz <br> i will give brainliest
VLD [36.1K]

Answer:

B

Explanation:

Vanadium Oxide is a Catalyst for the contact process

And Catalysts are used to speed up the reaction rate, therefore the answer is "to increase the rate if reaction"

SIDE NOTE = catalysts are not used up in a reaction btw

3 0
3 years ago
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