Jeff is in a stationary school bus. Which is the best reference point for him to use to determine when the bus starts to move?

Four gases were combined in a gas cylinder with these partial pressures: 3.5 atm N2, 2.8 atm O2, 0.25 atm Ar, and 0.15 atm He. W

Marat540 [252]

Answer :

The total pressure inside the cylinder is, 6.7 atm

The mole fraction of $N_2$ in the mixture is, 0.52

Solution :

First we have to calculate the total pressure inside the cylinder.

According to the Dalton's law, the total pressure of the gas is equal to the sum of the partial pressure of the mixture of gasses.

$P_T=p_{N_2}+p_{O_2}+p_{Ar}+p_{He}$

Now put all the given values is expression, we get the total pressure inside the cylinder.

$P_T=3.5+2.8+0.25+0.15=6.7atm$

Now we have to calculate the mole fraction of $N_2$ in the mixture.

Formula used :

$p_{N_2}=X_{N_2}\times P_T$

where,

$P_T$ = total pressure = 6.7 atm

$p_{N_2}$ = partial pressure of nitrogen gas = 3.5 atm

$X_{N_2}$ = mole fraction of nitrogen gas = ?

Now put all the given values in the above formula, we get

$3.5atm=X_{N_2}\times 6.7atm$

$X_{N_2}=0.52$

Therefore, the total pressure inside the cylinder is, 6.7 atm and the mole fraction of $N_2$ in the mixture is, 0.52

6 0

2 years ago

According to the quantum-mechanical model for the hydrogen atom, which electron transitions produces light with the longer wavel

Anna007 [38]

Answer:2p→1s

Explanation:

Frequency is inversely proportional to wavelength. The higher the frequency, the shorter that wavelength. The smaller the frequency the longer the wavelength. The frequency of light associated with 2p→1s is less than the frequency of light associated with 3p→1s since the latter represents transition from a much higher energy level. It follows that the wavelength associated with the former will be longer since its frequency is lesser. This deduction follows from our argument about the inverse relationship between frequency and wavelength.

6 0

2 years ago

Which describes the process that forms teflon tm? molecular fluorine (f2) undergoes polymerization. a fluorocarbon polymer break

Stella [2.4K]

Answer:
T<span>etrafluoroethene (F</span>₂CCF₂<span>) undergoes polymerization describes the formation of Teflon.

Explanation:
Polymerization is the process in which small units called as monomers join together repeatedly and forms a long chain macro-molecule called as polymer.
In given question the monomer is Tetrafluoroethene because alkenes can undergo polymerization via Addition polymerization via following mechanism.
a) Free Radical Addition Reaction

b) Acid Catalyzed Addition Reaction

c) Base catalyzed Addition Reaction

The formation of Teflon from Tetrafluoroethene is shown below,</span>

6 0

2 years ago

Read 2 more answers

Plasma is found in which of the following substances?

vichka [17]

I think is is A. welding torches

3 0

2 years ago

Which of the following can serve as evidence to support the claim that human consumption of water impacts earths system

Brilliant_brown [7]

Ouestion: Which of the following can serve as evidence to support the claim that human consumption of water impacts earths system?

Answer & Explanation: Typically as human populations and per-capita consumption of natural resources increase, so do the negative impacts on Earth unless the activities and technologies involved are engineered otherwise. (MS-ESS3-3), (MS-ESS3-4)

Hope this helps and comment down below if you need more information!

Fr0ggyLikeSMELLY

7 0

2 years ago