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Sveta_85 [38]
3 years ago
5

One characteristic of a scientific theory is that____

Chemistry
1 answer:
Sladkaya [172]3 years ago
3 0

Answer: it should be as simple and logical as possible.

Explanation: when producing a scientific theory, one shouldn't introduce stretched realities. For example, if I come back home and find the fridge open, it's very unlikely that a pink elephant came into my house while I was gone and opened it, I must have left it open when I left.

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Whenever ___ energy is needed
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A chemist dissolved crystals of an unknown substance into water at room temperature. He found that 33 g of the substance can be
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The answer is: It's solubility
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Friction is the force that occurs when: A. one object attracts or repels another. B. one object is rubbing against another. C. o
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Suppose a student started with 142.0 mg of trans-cinnamic acid, 412 mg of pyridinium tribromide, and 2.30 mL of glacial acetic a
nirvana33 [79]

Answer: Theoretical Yield = 0.2952 g

               Percentage Yield = 75.3%

Explanation:

Calculation of limiting reactant:

n-trans-cinnamic acid moles = (142mg/1000) / 148.16 = 9.584*10⁻⁴ mol

pyridium tribromide moles = (412mg/1000) / 319.82= 1.288*10⁻³ mol

  • n-trans-cinnamic acid is the limiting reactant

The molar ratio according to the equation mentioned is equals to 1:1

The brominated product moles is also = 9.584*10⁻⁴ mol

Theoretical yield = (9.584*10⁻⁴ mol) * (Mr of brominated product)

                             =  (9.584*10⁻⁴ mol) * (307.97) = 0.2952 g

Percentage Yield is : Actual Yield / Theoretical Yield = 0.2223/0.2952

                                                                                           = 75.3%

4 0
3 years ago
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