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Elodia [21]
3 years ago
12

In a redox reaction, reduction is defined by the:

Chemistry
1 answer:
jonny [76]3 years ago
5 0

Answer:

C. Gain in electron(s) resulting in a decrease of oxidation number.

Explanation:

Redox reactions are reactions involving transfer of of electron between two species (reduction specie) and (oxidation species) and change resulting in change in oxidation number.

Reduction in terms of redox reaction is the specie that accepts electron(s) and gets "reduced" since its oxidation state has been reduced.

For example

Cl + e- → Cl⁻

The above reaction is an example of reduction reaction taking place in a redox reaction. We can see that Chlorine oxidation state was changed from (0) to (-1) state.

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What elements comprise the largest portion of Earth's atmosphere?​
Mrrafil [7]

Answer:

Nitrogen and Oxygen make up 99% of the Earths atmosphere. Then Argon makes up the rest of the atmosphere.

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What is the volume of 2.268mol of oxygen gas at 35○C and 3.0atm?
Eduardwww [97]
The volume is 

3 x_{123}
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How do you balance the equation Hydrogen plus Oxygen yield water?
Andre45 [30]
Hey there! Hello!

Not sure if you still need the answer to this question, but I'd love to help out if you do. 

So, the way to balance this equation is pretty simple. First, you need to keep in mind that molecules of hydrogen and oxygen do not come in single molecules, but in bonded pairs, represented by H2 and O2. 

H2+O2=H2O

But, that's incorrect. The combination of 2 hydrogen molecules with 1 oxygen molecule yields water, but that leaves one oxygen molecule leftover. When broken down, this is how many of each molecule is on each side of the previously stated equation:

Left:
H: 2
O: 2

Right:
H: 2
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So we have to multiply H2O on the right side by 2 in order to get this:

H2+O2=2(H2O)

Left: 
H: 2
O: 2

Right: 
H: 4
O: 2

The last step is to multiply H2 on the left by two to make it match up with the right side, balancing the equation:

2(H2)+O2=2(H2O)

Left: 
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O: 2

Right: 
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O: 2

That makes our equation balanced! I hope this helped you out, feel free to ask any additional questions if you need further clarification. :-)
5 0
3 years ago
How to round significant figures
marissa [1.9K]

Explanation:

To round to a significant figure:

  1. look at the first non-zero digit if rounding to one significant figure
  2. look at the digit after the first non-zero digit if rounding to two significant figures
  3. draw a vertical line after the place value digit that is required
  4. look at the next digit
  5. if it's 5 or more, increase the previous digit by one
  6. if it's 4 or less, keep the previous digit the same
  7. fill any spaces to the right of the line with zeros, stopping at the decimal point if there is one

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3 years ago
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What is the difference between the formula of magnesium oxide and oxygen?
lianna [129]

Oxygen is an element, symbol O

Magnesium oxide is an ionic compound, formula MgO

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