Why is energy required to break a covalent bond

2 answers:

6 0

Because when a chemical reaction occurs. molecular bonds are broken and other bonds are formed to make different molecules. Like for example: two bonds of water molecules are broken up into hydrogen and water form. Energy is required to break a bond.

Hope this helped :)

zmey [24]3 years ago

4 0

Energy is always required to break a bond, which is known as bond energy.

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The number of nitrogen atoms in one mole of nitrogen gas are...

9966 [12]

Explanation:

The number of nitrogen atoms in one mole of nitrogen gas are 6.02214179×1023 nitrogen atoms. 

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3 years ago

47.0ml of a HBr solution were titrated with 37.5ml of a 0.215M LiOH solution to reach the equivalence point. what is the molarit

faltersainse [42]

Hello!

The molarity of the HBr solution is 0,172 M.

Why?

The neutralization reaction between LiOH and HBr is the following:

HBr(aq) + LiOH(aq) → LiBr(aq) + H₂O(l)

To solve this exercise, we are going to apply the common titration equation:

$M1*V1=M2*V2$

$M1=\frac{M2*V2}{V1}= \frac{0,215 M * 37,5 mL}{47 mL}=0,172 M$

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3 years ago

How to separate crystals from solution

tatiyna

Answer:

If a saturated hot solution is allowed to cool, the solute is no longer soluble in the solvent and forms crystals of pure compound. Impurities are excluded from the growing crystals and the pure solid crystals can be separated from the dissolved impurities by filtration.

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2 years ago

Plz Help!! 20 points!!

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The drawing is correct because there are 12 atoms of each type on each side of the arrow.

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3 years ago

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I believe the correct response is A. At higher elevations it would take less time to hard boil an egg, because there is less atmospheric pressure.

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