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labwork [276]
3 years ago
14

If water and oil are combine If water and oil are combined in a container, the resulting liquid is a(n) A. solution. B. mixture.

C. emulsion. D. suspension.d in a container, the resulting liquid is a(n) A. solution. B. mixture. C. emulsion. D. suspension.
Chemistry
1 answer:
mart [117]3 years ago
8 0
B. Mixture is the answer
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D. 12 is 1 × 10-6

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A student thinks that halogens are highly reactive because their electrons are weakly attracted to their nuclei. Which is eviden
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Answer: Halogens tend to attract electrons when bonding (Option C)

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A. Based on the activation energies and frequency factors, rank the following reactions from fastest to slowest reaction rate, a
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Answer:

A) E_{a} = 350KJ/mol, E_{a} = 50KJ/mol, E_{a} = 50KJ/mol

     A = 1.5×10^{-7}s^{-1}, A = 1.9×10^{-7} s^{-1}, A=1.5×10^{-7} s^{-1}

B) 4.469

Explanation:

From Arrhenius equation

      K=Ae^{\frac{E_{a} }{RT} }

where; K = Rate of constant

            A = Pre exponetial factor

            E_{a} = Activation Energy

             R = Universal constant

             T = Temperature in Kelvin

Given parameters:

E_{a} =165KJ/mol

T_{1}=505K

T_{2}=525K

R=8.314JK^{-1}mol^{-1}

taking logarithm on both sides of the equation we have;

InK=InA-\frac{E_{a} }{RT}

since we have the rate of two different temperature the equation can be derived as:

In(\frac{K_{2} }{K_{1} } )=\frac{E_{a} }{R}(\frac{1}{T_{1} } -\frac{1}{T_{2} } )

In(\frac{K_{2} }{K_{1} } )=\frac{165000J/mol}{8.314JK^{-1}mol^{-1}  }.(\frac{1}{505} -\frac{1}{525} )

In(\frac{K_{2} }{K_{1} } )= 19846.04×7.544×10^{-5} = 1.497

\frac{K_{2} }{K_{1} } =e^{1.497} = 4.469

 

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Explanation:

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What is the molar mass of C4H10
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Your answer would be 58.12g/mol ;)
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