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2 years ago

Which statement best describes the role of plate tectonics in changes that occur on Earth?

Chemistry

1 answer:

k0ka [10]2 years ago

3 0

Answer:

the answer is A i learned this in class and i had the exact same question

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How do solve for density?

Pachacha [2.7K]

Density(D) is defined as Mass(M) divided by Volume(V).

The formula for Density is:

D = M / V.

Another way to remember the formula for Density is to remember "Mass per unit of volume".

I hope this helps!

7 0

2 years ago

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

deff fn [24]

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

6 0

2 years ago

The volume of a given mass of an ideal gas at constant pressure is

zmey [24]

Answer:

inversely proportional to the kelvin temperature

Explanation:

PV=nRT

8 0

2 years ago

Read 2 more answers

An isotope will lose nucleons,protons,or neutrons in order to become more

Debora [2.8K]

Many atoms if they are radioactive isotopes will loss protons and neutrons as radiation in order to gain and become more stable

hope that helps

8 0

3 years ago

Read 2 more answers

If you were able to magnify a penny down to the atomic level, what two

Lena [83]

The two observations you would make about the atoms are

They are made up largely of empty space
Their mass is concentrated at the center called a nucleus

These observations were made by Ernest Rutherford in his model of the atom established in 1911, when he performed his gold foil experiment and observed the scattering angle of the alpha particles which led him to conclude that the mass of the atom was concentrated at the center.

Also, that most of the alpha particles also went through the gold foil suggested that the atom was made up basically of empty space.

So,

The two observations you would make about the atoms are

They are made up largely of empty space
Their mass is concentrated at the center called a nucleus

Learn more about the atom here:

brainly.com/question/24873449

7 0

2 years ago