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4 years ago

Which statement identifies what happens when bonds are broken?

Chemistry

2 answers:

ololo11 [35]4 years ago

6 0

The answer to this would be promptly A.

den301095 [7]4 years ago

5 0

Answer:

The attraction between atoms weakens, so they separate into elements or simpler compounds.

Explanation:

i took the test and got it correct

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Metamorphism involves the transformation of pre-existing rocks by

sveticcg [70]

Heat and pressure
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3 years ago

You need to produce a buffer solution that has a pH of 5.03. You already have a solution that contains 10. mmol (millimoles) of

mario62 [17]

Explanation:

We have given the acid that is, acetic acid. It is known that acetic acid is a weak acid.

Therefore, formula that depicts relationship between pH, $pK_{a}$ and weak acid is as follows.

pH = $pK_{a}$ + log $\frac{[A^{-}]}{[HA]}$

where, [HA] = concentration of weak acid

$[A^{-}]$ = concentration of conjugate base of given weak acid

Since, we have to calculate the concentration of conjugate base of acetic acid. So, let it be equal to x. Whereas concentration of acetic acid is 10 mmol, $pK_{a}$ is 4.74 and pH is 5.03.

Hence, putting these values in the above formula as follows.

pH = $pK_{a}$ + log $\frac{[A^{-}]}{[HA]}$

5.03 = 4.74 + log $\frac{x}{10}$

$\frac{x}{10}$ = antilog (0.29)

x = 19.4 mmol

Thus, we can conclude that there is 19.4 mmol acetate (the conjugate base of acetic acid) will be needed to add to this given solution.

8 0

3 years ago

What are elementary particles the make up protons and nuetrons

ahrayia [7]

they are made by of two types of elementary particles

electrons and quarks

quetion answered by

(jacemorris04)

4 0

3 years ago

Read 2 more answers

Determine the oxidation number of Cl in each of the following species.Cl2O7AlCl4-Ba(ClO2)2CIF4+

DIA [1.3K]

These are four questons and four answers:

Answers:

1) 7⁺

2) 1⁻

3) 3⁺

4) 5⁺

Explanation:

Question 1) Cl₂O₇:

a) Net charge of the compound: 0

b) Rule: oxygen works with oxidation state +2, except with peroxides.

d) Rule: balance of charges: ∑ of the charges = net charge

Call X the oxidation number of Cl:

2×X + 7 (-2) = 0

2X - 14 = 0

2X = +14

X = +14 /2 = + 7

Conclusion: the oxidation number of Cl in Cl₂O₇ is 7⁺.

Question 2) AlCl₄⁻

a) Net charge of the ion: - 1

b) Rule: common oxidation number of Al in compounds: +3

c) Rule: balance of charges: ∑ charges = net charge = - 1

1 (+3) + 4X = - 1

+3 + 4X = - 1

4X = - 1 - 3

4X = - 4

X = - 1

Conclusion: the oxidation number of Cl in AlCl₄⁻ is 1 ⁻.

Question 3) Ba(ClO₂)₂

a) Net charge of the compound: 0

b) Rule: common oxidation number of BA in compounds: +2

c) Rule: common oxidation number of O in compounds (except in peroxides): -2

d) Rule: balance of charges: ∑ charges = net charge = 0

+2 + 2X + 4 (-2) = 0

2X +2 - 8 = 0

2X - 6 = 0

2X = +6

X = + 3

Conclusion: the oxidation number of Cl in Ba(ClO₂)₂ is 3⁺.

Question 4) CIF₄⁺

a) Net charge of the ion: + 1

b) Rule: common oxidation number of F : - 1 (it is the most electronegative)

c) Rule: balance of charges: ∑ charges = net charge = + 1

X + 4(-1) = +1

X - 4 = +1

X = +1 + 4

X = + 5

Conclusion: the oxidation number of Cl in ClF₄⁺ is 5⁺.

6 0

3 years ago

The diagram shows three isotopes. What element is represented?

lisov135 [29]

Answer:

Where is the diagram?please put the pictu

3 0

3 years ago

Read 2 more answers