3 years ago

Using the geologic concept of plate boundaries, compare and contrast the formation of the Andes Mountains,

Chemistry

1 answer:

Ket [755]3 years ago

4 0

Answer:

Oo Japan. I love japan it’s so pretty and I wish I could go there, it’s my dream place to visit!

Explanation:

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If you touch a hot stove, the nervous system works closely with which other organ system to help your body react by pulling away

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Answer:

2. Muscular System

Explanation:

The muscular system is associated with body motion. Hence, the right answer is option 2.

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3 years ago

Hydrogen is diffusing through solid nickel. At a temperature of 358 K, the diffusivity is 1.16 x 10-8 cm2/s. At a temperature of

Lelu [443]

Answer:

Q_d=35881 J/mol

So the activation energy is 35881 J/mol.

Explanation:

Consider the following equations:

$lnD_{1} =lnD_{o} -\frac{Q_{d} }{R*T_{1} }$

$lnD_{2} =lnD_{o} -\frac{Q_{d} }{R*T_{2} }$

Solving the above two equation to find the Q_d in term of diffusivity and temperature we will get:

$Q_{d}=-R*\frac{lnD_{1} -lnD_{2} }{\frac{1}{T_{1} }-\frac{1}{T_{2} } }$

where:

Q_d is the activation energy

D_1 is the diffusivity at T_1

D_2 is the diffusivity at T_2

$Q_{d}=-8.31*\frac{ln1.16*10^-12 -ln1.05*10^-11 }{\frac{1}{358 }-\frac{1}{438 } }$

Q_d=35881 J/mol

So the activation energy is 35881 J/mol.

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The components of a mixture maintain their original properties. T/F

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The components of a mixture maintain their original properties. True. That is because a mixture is not combined chemically.

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WHICH LAW?

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Please scan the whole entire question

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Express in scientific notation. Choose the answer with the proper number of significant figures.

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5*10^-18 is the answer because in scientific notation the first number has to be between 1 and 10

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3 years ago

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