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aksik [14]
3 years ago
5

Dalton's Law of Partial pressure: The total pressure of a gas mixture is the sum of the partial pressures of each gas . Therefor

e if I have a gas chamber with 3.1 atm of Xe and 0.8 atm of N2 and no H2,.. What is the pressure in the chamber.
Chemistry
2 answers:
larisa86 [58]3 years ago
8 0

Answer:

Total Pressure = 3.9atm

Explanation:

Dalton's law says the pressure of a gas mixture is the sum of partial pressures of each gas.

In the problem, you have two gases in a chamber: Xe, N₂.

Thus, pressure of chamber is:

Total Pressure = Pressure Xe + Pressure N₂

Total Pressure = 3.1 atm + 0.8 atm

<em>Total Pressure = 3.9atm</em>

<em></em>

IceJOKER [234]3 years ago
8 0

Answer:

The total pressure of this gas mixture in the chamber is 3.9 atm

Explanation:

Step 1: Data given

Partial pressure of Xe = 3.1 atm

Partial pressure of N2 = 0.8 atm

Partial pressure of H2= 0 atm

Dalton's law says: Total pressure of a gas mixture = sum of partial pressure of gasses

Step 2: Calculate the total pressure of a gas mixture

Dalton's law says: Total pressure of a gas mixture = sum of partial pressure of gasses

Total pressure of the gas mixture = Partial pressure of Xe + Partial pressure of N2 + partial pressure of H2

Total pressure of the gas mixture = 3.1 atm + 0.8 atm + 0 atm

Total pressure of the gas mixture =  3.9 atm

The total pressure of this gas mixture in the chamber is 3.9 atm

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If you run this reaction with 15 g of CuCl2 and 20 g NaNO3, what is the theoretical yield of NaCl?
Margaret [11]

The theoretical yield of a substance is the amount of the mass that is calculated from stoichiometry. The mass of sodium chloride produced is 13.03 gms.

<h3>What is mass?</h3>

Mass of the substance is a multiplication of the molar mass and moles.

The balanced reaction is given as:

CuCl₂ + 2NaNO₃ ⇒ 2NaCl + Cu(NO₃)₂

Moles of copper chloride are calculated as: 15 ÷ 134.45 = 0.115 moles

Moles of sodium nitrate are calculated as: 20 ÷ 84.99 = 0.2353 moles

From the reaction, 1 mole of copper chloride gives 2 moles of sodium chloride so, 0.115 moles of copper chloride will produce 0.223 moles.

Similarly, 2 moles of sodium nitrate produce 2 moles of sodium chloride so, 0.2353 moles produce 0.4706 moles.

From this, it can be concluded that copper chloride is a limiting reagent and will be used to calculate the mass of NaCl.

Mass of NaCl is calculated as: Mass = 0.223 moles × 58.44 = 13.03 gms.

Therefore, 13.03 gms is the theoretical yield of sodium chloride.

Learn more about theoretical yield here:

brainly.com/question/1419024

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7 0
2 years ago
As a technician in a large pharmaceutical research firm, you need to produce 250. mL of a potassium dihydrogen phosphate buffer
Reika [66]

Answer:

We will need 147.772 mL of KH2PO4 to make this solution

Explanation:

For this case we can give the following equation:

H2PO4 - ⇄ H+ + HPO42-

With following pH- equation:

pH = pKa + log [HPO42-]/[H2PO4-]

7.05 = 7.21 + log [HPO42-]/[H2PO4-]

-0.16 =  log [HPO42-]/[H2PO4-]

10^-0.16 = [HPO42-]/[H2PO4-]

0.6918 = [HPO42-]/[H2PO4-]

Let's say the volume of HPO42-= x  then the volume of H2PO4- will be 250 mL - x

Since both have a concentration of 1M = 1 mol /L

If we plug this in the equation 0.6918 = [HPO42-]/[H2PO4-]

0.6918 = x / (250 - x)

0.6918*250 - 0.6918x = x

172.95 = 1.6918x

x = 102.228 mL

The volume of HPO42- = 102.228 mL

Then the volume of H2PO4- = 250 - 102.228 = 147.772 mL

To control this we can plug this in the pH equation

7.05 = 7.21 + log [HPO42-]/[H2PO4-]

7.05= 7.21 + log (102.228 / 147.772) = 7.05

We will need 147.772 mL of KH2PO4 to make this solution

3 0
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Nonmetal halogen family atmoic mass 35
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chlorine has the atomic mass of 35.5 and is a non metal in the halogen family

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boyakko [2]
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I think the right answer is 2.5
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