True or false Constructive forces have been wearing away Earths surface for millions of years.

A box contains 104 gas molecules, 2500 of nitrogen and 7500 of argon in thermal equilibrium. The molecular weight of N2 is 28g/m

LekaFEV [45]

Answer : The temperature of this gas will be, 206.9 K

Explanation :

The expression for the kinetic energy per molecule of monoatomic gas (argon) is:

$K.E_{argon}=n_{argon}\times \frac{3}{2}\times K_BT$ ...........(1)

The expression for the kinetic energy per molecule of diatomic gas (nitrogen gas) is:

$K.E_{nitrogen}=n_{nitrogen}\times \frac{5}{2}\times K_BT$ .............(2)

The total kinetic energy of the molecule will be,

$K.E_{Total}=K.E_{argon}+K.E_{nitrogen}$

Now put all the expression in this, we get:

$K.E_{Total}=(7500)\times \frac{3}{2}\times K_BT+(2500)\times \frac{5}{2}\times K_BT$

$T=\frac{K.E}{17500\times K_B}$

Now put all the given values in this expression, we get:

$T=\frac{5\times 10^{-17}J}{17500\times (1.381\times 10^{-23}J/K)}$

$T=206.9K$

Therefore, the temperature of this gas will be, 206.9 K

8 0

4 years ago

What does the atomic number mean or represent? also how do i make someone brainliest

sdas [7]

Answer:

it represents the numner of protons in an atoms nucleus

5 0

4 years ago

An iron nail rusts when exposed to oxygen. According to the following reaction, how many moles of iron(III) oxide will be formed

Zigmanuir [339]

Answer:

0.453 moles

Explanation:

The balanced equation for the reaction is:

2Fe(s) + 3O2(g) ==> 2Fe2O3

From the equation, mass of O2 involved = 16 x 2 x 3 = 96g

mass of Fe2O3 involved = [(2x26) + 3 x 16] x 2

= 100g

Therefore 96g of O2 produced 100g of Fe2O3

32.2g of O2 Will produce 100x32.2/96

= 33.54g of Fe2O3

Converting it to mole using number of mole = mass/molar mass

but molar mass of Fe2O3 = 26 + (16 X 3)

= 74g/mole

Therefore number of mole of 33.54g of Fe2O3 = 33.54/74

= 0.453 moles

5 0

3 years ago

A sound wave has a wavelength of 0.450

Karolina [17]

Answer:

The wave's frequency is 733 hertz.

Explanation:

The wavelength (λ) is the minimum distance between two points of the wave that are in the same state of vibration.

Frequency (f) is the number of vibrations that occur in a unit of time.

The speed of propagation (v) is the speed with which the wave propagates in the middle. Relate wavelength (λ) and frequency (f) inversely proportionally using the following equation: v = f * λ.

In this case you know that:

Wavelength of the sound wave (λ) = 0.450 meters
Speed of the sound wave (v)= 330 meters per second= 330 $\frac{meters}{second}$

Replacing you get:

$330 \frac{meters}{second} = f* 0.450 meters$

Then:

$f=\frac{330 \frac{meters}{second} }{0.450 meters}$

f=733.33 hertz≅733 hertz

Finally, the wave's frequency is 733 hertz.

6 0

3 years ago

A app181.studyisland.com

grandymaker [24]

C. At some point, the land masses were connected to each other.

Explanation:

The fossils now exists far away from each other because at some point, the land masses were once connected to each other. Now, the land masses have drifted apart due to plate tectonics.

Alfred Wegener a scientist in 1912 first formulated the theory of continental drift. The theory suggests that present day land masses have moved to their present positions.

A more refined theory of plate tectonics is now in play today and it provides a better understanding to why we can find similar features across different continents.
The similar fossils must have formed together when the land masses were once joined together.
Noe that the land masses are separated, the fossils species are not separated.

learn more:

Continental drift brainly.com/question/5002949

#learnwithBrainly

8 0

3 years ago