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erica [24]
3 years ago
12

-2(3b-2)=8b-10 this is a problem that i am stuck on. math enough said

Chemistry
2 answers:
zimovet [89]3 years ago
8 0

You first start by distributing the -2 in front of the parenthesis. You get -6b+4=8b-10. Then I would add the 6b to 8b so you would have 4=14b-10. Then add the 10 to the 4 and you get 14=14b. Then to get b by itself you want to divide by 14 so you end up with 1=b

adoni [48]3 years ago
3 0
The answer is B=1

-2(3b-2)=8b-10
-6b+4=8b-10
-14b+4=-10
-14b=-14
B=1
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The force of attraction between a divalent cation and a divalent anion is 1.64 x 10-8 N. If the ionic radius of the cation is 0.
Elden [556K]

The radius of the anion is 7.413 nm

<h3>How to calculate the force of attraction between charges</h3>

The force of attraction (F) is given by the formula:

  • F = (1/4π∈r²)(Zc*e)(Za*e)

where:

∈ = permittivity of free space = 8.85*10⁻¹⁵ F/m

Zc = charge on the cation = +2

Zc = charge on the anion = -2

e = charge on an electron = 1.602 * 10⁻¹⁹ C

r = interionic distance

r = rc + ra

where rc and ra are the radius of the cation and anion respectively

F = 1.64 * 10⁻⁸ N

Therefore based on the equation of force of attraction:

1.64 *10⁻⁸ = [1/4π(8.85*10⁻¹⁵)r²](2 * 1.602*10⁻¹⁹)²

r² = 5.63 * 10⁻¹⁷

r = 7.50 nm

Since r = rc + ra

where rc = 0.087 nm

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ra = 7.413 nm

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Learn more about ionic radius at: brainly.com/question/2279609

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Answer:

1. The actual amount of product that is produced from a given amount of reactant or reactants.  → actual yield  

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4. The reactant that limits how much product is produced in a reaction that goes to completion. It is used up in the reaction. → limiting reactant  

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7. The study of the quantitative relationships between reactants and products in a chemical reaction. → stoichiometry  

Explanation:

1. The actual amount of product that is produced from a given amount of reactant or reactants.  → actual yield  

  • The actual yield is the actual amount of product that is produced in a chemical reaction and it can be determined experimentally.

2. A law which states that in ordinary chemical reactions, the sum of the masses of the reactants always equals the sum of the masses of the products.    → Conservation of Mass

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3. The reactant that is not used up in a reaction that goes to completion

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4. The reactant that limits how much product is produced in a reaction that goes to completion. It is used up in the reaction. → limiting reactant  

  • In any chemical reaction between two or more reactants, the limiting reactant is the substance that is consumed completely when the chemical reaction is ended. The amount of product formed is limited by this reagent, since the reaction cannot continue without it.

5. The ratio of the actual yield to theoretical yield multiplied times 100.

→ percent yield

  • percent yield  = (actual yield / theoretical yield) *100

6. The maximum calculated amount of product produced from a given

reactant in a reaction that goes to completion.

→ theoretical yield

  • theoretical yield  is defined as the amount of the obtained desired product.

7. The study of the quantitative relationships between reactants and products in a chemical reaction.

→ Stoichiometry

  • Stoichiometry is a branch of chemistry that deals with relationships between reactants and/or products in a reaction to determine desired quantitative data.

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