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3 years ago

Are pressure and temperature directly proportional?

1 answer:

4 0

For a constant volume and amount of air, the pressure and temperature are directly proportional, provided the temperature is in kelvin. (Measurements cannot be made at lower temperatures because of the condensation of the gas.)

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Water is produced from the reaction of hydrogen and oxygen gas, according to the equation below. What is the excess reactant in

liq [111]

Explanation:

Mole ratio of Oxygen to Hydrogen gas = 1 : 2.

If we use 3.0 moles of oxygen gas, we would need 3.0 * 2 = 6.0 mol of hydrogen gas.

However we only have 4.2 mol of hydrogen. Therefore hydrogen is limiting and oxygen is in excess. (B)

3 0

4 years ago

The partial pressure of N2 in a mixture of gases, where the total pressure is 1.50 atm, is 300. torr. What is the mole fraction

makvit [3.9K]

Answer:

The mole fraction of N₂ is 0.26.

Explanation:

The pressure exerted by a particular gas in a mixture is known as its partial pressure. So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:

PT = PA + PB

This relationship is due to the assumption that there are no attractive forces between the gases.

Dalton's partial pressure law can also be expressed in terms of the mole fraction of the gas in the mixture. The mole fraction is a dimensionless quantity that expresses the ratio of the number of moles of a component to the number of moles of all the components present.

So in a mixture of two or more gases, the partial pressure of gas A can be expressed as:

PA = XA * PT

In this case:

PA= PN₂= 300 torr
XA=XN₂= ?
PT= 1.50 atm= 1140 torr (being 1 atm= 760 torr)

Replacing:

300 torr= XN₂*1140 torr

Solving:

$X_{N_{2} } =\frac{300 torr}{1140 torr}$

XN₂= 0.26

<u><em>The mole fraction of N₂ is 0.26.</em></u>

6 0

3 years ago

Next the students measured the density of aluminum metal. The accepted density for aluminum is 2.7 g/cm3. The students collected

katovenus [111]

Answer:

yo that's too long you should try and my it shorter

3 0

4 years ago

Drawing a conclusion derived from knowledge of an established principle is called deductive reasoning.

allsm [11]

Answer:

the answer would be true

8 0

4 years ago

Read 2 more answers

What is the percent by mass of the solution formed when 5.0 g of solute is dissolved in 40. g of water

d1i1m1o1n [39]

Answer:

Explanation:

so let say 5.0/100×40

that is 2

thank you please follow me

7 0

3 years ago