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3 years ago

Help on both questions ? I’ll give Brainliest ( it don’t look like I spelled it right but I think I did )

Chemistry

1 answer:

sleet_krkn [62]3 years ago

4 0

Answer:

friction slows motion

Explanation:

sorry I don't know the other one

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A volume of nitrogen gas has a density of 1.301.30 kg/m3 and a pressure of 1.151.15 atm. Find the temperature of the gas and the

Alexus [3.1K]

Answer :

The temperature of the gas is, 301.7 K

The root mean square speed is, $5.18\times 10^{2}m/s$

Explanation :

To calculate the volume of argon gas we are using ideal gas equation:

$PV=nRT\\\\PV=\frac{w}{M}RT\\\\P=\frac{w}{V}\times \frac{RT}{M}\\\\P=\frac{\rho RT}{M}$

where,

P = pressure of nitrogen gas = 1.15 atm

V = volume of nitrogen gas

T = temperature of nitrogen gas

R = gas constant = 0.0821 L.atm/mole.K

w = mass of nitrogen gas

M = molar mass of nitrogen gas = 28 g/mole

$\rho$ = density of nitrogen gas = $1.30kg/m^3=1.30g/L$

Now put all the given values in the ideal gas equation, we get:

$1.15atm=\frac{(1.30g/L)\times (0.0821L.atm/mole.K)\times T}{28g/mol}$

$T=301.7K$

Therefore, the temperature of the gas is, 301.7 K

Now we have to determine the root mean square speed of the molecule.

The formula used for root mean square speed is:

$\nu_{rms}=\sqrt{\frac{3kN_AT}{M}}$

where,

$\nu_{rms}$ = root mean square speed

k = Boltzmann’s constant = $1.38\times 10^{-23}J/K$

T = temperature = 301.7 K

M = atomic mass of nitrogen gas = 0.028 kg/mole

$N_A$ = Avogadro’s number = $6.02\times 10^{23}mol^{-1}$

Now put all the given values in the above root mean square speed formula, we get:

$\nu_{rms}=\sqrt{\frac{3\times (1.38\times 10^{-23}J/K)\times (6.02\times 10^{23}mol^{-1})\times (301.7K)}{0.028kg/mol}}$

$\nu_{rms}=5.18\times 10^{2}m/s$

The root mean square speed is, $5.18\times 10^{2}m/s$

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3 years ago

The atomic number of an atom of Br with a mass number of 80 is

pantera1 [17]

Answer:

B. 35 the atomic number is equal to the proton number

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3 years ago

Melting can be best described as a process in which molecules?

ludmilkaskok [199]

Answer:

D.gain enough kinetic energy to get past each other.

Explanation:

Melting can be best described as a process in which molecules gain enough kenetic energy to put past each other.

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3 years ago

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The moving of molecules from areas of high concentration to that of low concentration to gain energy is best described as

seropon [69]

The moving of molecules from areas of high concentration to that of low concentration to gain energy is best described as passive transport

<h3>What is passive transport?</h3>

Passive transport is a type of membrane transport in which chemicals are moved across cell membranes without using energy. Unlike active transport, which uses cellular energy, passive transport uses the second law of thermodynamics to cause the movement of substances across cell membranes.

<h3>Why is passive transport important?</h3>

Passive transport processes are critical to homeostasis. They maintain proper conditions inside the cell and the organism as a whole by letting chemicals to pass into and out of the cell.

To know more about Passive transport visit:

brainly.com/question/13542102

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2 years ago

Which of the following is a variable property for a gas ? Select all that apply.

disa [49]

C) volume
.........
The volume of gas depends on e.g. temperature and pressure.

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3 years ago

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