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otez555 [7]
2 years ago
11

Can anybody help me with this? Will mark as the brainliest... NO LINKS!!

Chemistry
1 answer:
Maurinko [17]2 years ago
4 0

Answer:

The two gasses diffuse through the tube and when they meet a reaction takes place forming a white solid of ammonium chloride.

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Tartaric acid, C4H6O6, has the first ionization constant with the value: Ka1 = 9.20 × 10-4. Calculate the value of pKb for the c
nirvana33 [79]

Answer:

pKb = 10.96

Explanation:

Tartaric acid is a dyprotic acid. It reacts to water like this:

H₂Tart  +  H₂O  ⇄  H₃O⁺   +  HTart⁻         Ka1

HTart⁻  +  H₂O  ⇄  H₃O⁺   +  Tart⁻²           Ka2

When we anaylse the base, we have

Tart⁻²   +  H₂O  ⇄  OH⁻  +  HTart⁻       Kb1

HTart⁻  +  H₂O  ⇄  OH⁻  +    H₂Tart          Kb2

Remember that Ka1 . Kb2  = Kw, plus pKa1 + pKb2 = 14

Kb2 = Kw / Ka1  →   1×10⁻¹⁴ / 9.20×10⁻⁴  = 1.08×10⁻¹¹

so pKb = - log Kb2   → - log 1.08×10⁻¹¹ = 10.96  

7 0
3 years ago
Read 2 more answers
What is the vapor pressure of a solution that contains 70.0 mL of ether and 30.0 mL of benzene?
Lera25 [3.4K]

Answer:

it is 50

if I m right pls mark me brainliest

6 0
3 years ago
The molar volume of oxygen,O2, is 3.90 dm3 mol-1 at 10.0 bar and 200 degree centigrade. Assuming that the expansion may be trunc
schepotkina [342]

Answer:

B = - 0.0326 dm³/mol

Explanation:

virial eq until second term:

  • PVm = RT [ 1 + B/Vm ]

∴ P = 10 bar * (atm/ 1.01325 bar) = 9.869 atm

∴ T = 200°C = 473 K

∴ Vm = 3.90 dm³/mol

∴ R = 0.08206 dm³.atm/K.mol

⇒ PVm / RT = 1 + B/Vm

⇒ ((9.869 atm)*(3.90 dm³/mol)) / ((0.08206 dm³.atm/mol.K)*(473K)) = 1 + B/Vm

⇒ 0.99164 = 1 + B/Vm

⇒ B/Vm = - 8.357 E-3

⇒ B = (3.90 dm³/mol)*( - 8.357 E-3 )

⇒ B = - 0.0326 dm³/mol

4 0
3 years ago
What element has the same number of valence electrons as sulfur?
FinnZ [79.3K]
Oxygen. Is the correct answer


Oxygen has the same number of valence electrons as sulfur. An ion can be an element that gained or lost an electron.
6 0
2 years ago
The gases that make up Earth’s atmosphere are commonly referred to as air. Air consists of major gases and trace gases. What is
Snezhnost [94]

Air is a mixture, Its constituens can be seperated

8 0
3 years ago
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