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Alex
2 years ago
7

Molecular iodine,

Chemistry
1 answer:
My name is Ann [436]2 years ago
8 0

Answer:

Half-life for this reaction is 2.56s

Explanation:

The general expression in a reaction that follows first-order is:

Ln[A] = -kt + ln[A]₀

<em>Where [A] is concentration of reactant after time t, </em>

<em>k is rate constant = 0.271s⁻¹</em>

<em>[A]₀ is initial concentration of reactant.</em>

<em />

Half-life is defined as the time required to decrease the initial concentration of the reactant (I2 in this case) halved.

If [A]₀ = 1

[A] = 1/2

Solving the equation:

Ln[1/2] = -0.271s⁻¹*t + ln[1]

Ln[1/2] = -0.271s⁻¹*t + 0

Ln[1/2] = -0.271s⁻¹t

Ln 2 = 0.271s⁻¹

2.56s = t

Half-life for this reaction is 2.56s

<em />

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What is density? A) mass divided by volume B) volume divided by mass
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A) mass divided by volume

Explanation:

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An astronomer observes an asteroid in the solar system. He notes that the asteroid is three times farther from the Sun than Eart
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How many moles of ScCl3 can be produced when 10.00 mol Sc react with 9.00 mol Cl2
Nuetrik [128]

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Explanation:

The reaction of Sc and Cl_2 to make ScCl_3 is:

2Sc+3Cl_2⇒2ScCl_3

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For 10 moles of Sc we need:

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So 15 moles of Cl_2 are required to react with 10 moles of Sc but we have 9 moles of Cl_2 , it means Cl_2 is limiting reactant.

Moles of ScCl_3=Given\  Moles\  of\ Cl_2 *\frac{2\  Moles\ o\ fScCl_3}{3\ Moles\ of\ Cl_2}

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4 0
3 years ago
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Individual measurements introduce errors that may be large or small depending on the quality of the tools and processes used. Sc
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Answer:

B. accepted value x 0.1

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in the equation provided

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put this value in the equation in stead of percentage error we get,

10 = \frac{error}{AcceptedValue} X100\\ \frac{10}{100} =\frac{error}{AcceptedValue}\\.1=\frac{error}{AcceptedValue}\\error = .1 X Accepted Value

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10 % percentage error means the experimental value has 10 % error compared to accepted value.so error will be 10 % of the accepted value

or .1 times of accepted value

8 0
3 years ago
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