Chemistry, 31.01.2020 13:50 NEUROPHARMACOLOGICAL

What pressure would a gas mixture in a 10.0 l tank exert if it were composed of 48.5 g he and 94.6 g co2 at 398 k?

Answers: 3

Show answers

Answers

Answer from: webbjalia04

46.6 atm

Explanation:

1) Data:

a) V = 10.0 l

b) He, m₁ = 48.5 g

c) CO₂, m₂ = 94.6 g

d) T = 398 K

e) p = ?

2) Formulae:

a) ideal gas equation: pV = nRT

b) Number of moles, n: n = mass in grams / molar mass

3) Solution:

a) Number of moles of He:

atomic mass of He: 4.003 g/moln₁ = 48.5 g / 4.003 g/mol = 12.12 mol

b) Number of moles of CO₂:

molar mass of CO₂: 44.01 g/moln₂ = 94.6 g / 44.01 g/mol = 2.15 mol

c) Total number of moles of the gas mixture:

n = n₁ + n₂ = 12.12 mol + 2.15 mol = 14.27 mol

d) Pressure, p:

pV = nRT ⇒ p = nRT / V p = 14.27 mol × 0.0821 atm-l/K-mol × 398K / 10.0l = 46.6 atm

Answer from: famouzgal

Pressure of gas mixture : P tot = 46,588 atm

Further explanation

Dalton's law of partial pressures states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the component gases

Can be formulated:

P tot = P1 + P2 + P3 ....

The partial pressure is the pressure of each gas in a mixture

Since the gas mixture consists of He and CO₂, we determine the pressure of each gas then we add them together to get the total pressure

We assume the ideal gas, so we use the formula:

$\large {\boxed {\bold {PV = nRT}}}$

where

P = pressure, atm, N / m²

V = volume, liter

n = number of moles

R = gas constant = 0.082 l.atm / mol K (P = atm, v = liter), or 8.314 J / mol K (P = Pa or N / m2, v = m³)

T = temperature, Kelvin

n = N / No

n = mole

No = Avogadro number (6.02.10²³)

n = m / m

m = mass

M = relative molecular mass

1. He

M = 4 g / mol

m = 48.5 g

n = m: M

n = 48.5: 4

n = 12,125 mole

PV = nRT

$\rm P=\dfrac{nRT}{V}\\\\P=\dfrac{12.125\times 0.082\times 398}{10}\\\\P=\boxed{39,571\:atm}}$

2. CO₂

M = 44 g / mol

m = 94.6 g

n = m: M

n = 94.6: 44

n = 2.15 mole

PV = nRT

$\rm P=\dfrac{nRT}{V}\\\\P=\dfrac{2.15\times 0.082\times 398}{10}\\\\P=\boxed{7.0167\:atm}}$

P tot = P He + P CO₂

P tot = 39,571 + 7.0167

P tot = 46,588 atm

Learn more

Which equation agrees with the ideal gas law

link

Which law relates to the ideal gas law

link

Answer from: Quest

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1

0.44 / 0.09 = 4.8

mgco3-5h2o"

Answer from: Quest

a polar bond is formed when electrons are shared unevenly between atoms

Another question on Chemistry

Chemistry, 21.06.2019 20:40

Astudent made the lewis dot diagram of a compound shown. what is the error in the lewis dot diagram? a)an o atom should transfer all of its six electrons to mg because the formula is mgo b) both electrons of mg should be transferred to one o adam because the formula is mgo c) the electrons should be transferred from each o add him to capital mg because mg has fewer electrons d) the number of dots around mg should be four because it has to transfer two electrons to each o

Answers: 1

Answer

Chemistry, 22.06.2019 09:00

Chemical energy is a form of a. kinetic energy only. b. both potential and kinetic energy. c. neither potential nor kinetic energy. d. potential energy only. reset

Answers: 1

Answer

Chemistry, 22.06.2019 09:00

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

Answers: 2

Answer

Chemistry, 22.06.2019 15:30

Plz me ! 1 which of earths spheres contains most of its mass? a atmosphere b hydrosphere c geosphere* d biosphere 2 erosion and weathering are examples of which types of forces? a constructive forces b destructive forces* c gravitational forces d inertia-related forces 3 which of the following statements about earths atmosphere is true? a earths atmosphere contains 78% water vapor which is essentail to life b earths atmosphere contains 21% oxygen c earths atmosphere contains carbon dioxide which all life forms require d earths atmosphere allows radiation from the sun to pass through it and warm earths surface* 4 the strenght of the force of gravity between two objects is determined by which of the following factors? select all that apply a the messes of the objects* b the distance between the objects* c the volumes of the objects d the surface area of the objects 5 earth and moon are kept in there respective orbits due to the influence of a inertia b gravity c gravity and inertia* d neither gravity or inertia if you answer all questions right i will give

Answers: 1

Answer

You know the right answer?

What pressure would a gas mixture in a 10.0 l tank exert if it were composed of 48.5 g he and 94.6 g...

Questions