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Ainat [17]
3 years ago
9

Calculate the molarity 20ml of 3.5 m kci in to a final volume of 100 ml​

Chemistry
1 answer:
satela [25.4K]3 years ago
3 0

Answer:

Molarity =  0.7 M

Explanation:

Given data:

Volume of KCl = 20 mL ( 0.02 L)

Molarity = 3.5 M

Final volume = 100 mL (0.1 L)

Molarity in 100 mL = ?

Solution:

Molarity = number of moles of solute / volume in litter.

First of all we will determine the number of moles of KCl available.

Number of moles = molarity × volume in litter

Number of moles = 3.5 M × 0.02 L

Number of moles = 0.07 mol

Molarity in 100 mL.

Molarity = number of moles / volume in litter

Molarity =  0.07 mol /0.1 L

Molarity =  0.7 M

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A rigid cylinder with a movable piston contains a sample of hydrogen gas. At 330. K, this sample has a pressure of 150. kPa and
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Answer:

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Explanation:

According to general gas equation:

P₁V₁/T₁ = P₂V₂/T₂

Given data:

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Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

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V₂ = P₁V₁ T₂/ T₁ P₂

V₂ =  1.5 atm ×  3.50 L × 273 K / 330 K × 1 atm

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4 0
3 years ago
Compute the equilibrium constant at 25 ∘C for the reaction between Sn2+(aq) and Cd(s), which form Sn(s) and Cd2+(aq). Express yo
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E°cell = E°cathode - E°anode

E°cathode= -0.14 V

E°anode= -0.40 V

E°cell = -0.14-(-0.40)

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E°cell= 0.0592/2 log K

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log K = 0.26/0.0296

log K= 8.7838

K= Antilog (8.7838)

K= 6.1×10^8

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Answer:

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Molecule: Br2 and Br2. <br> Is it polar or nonpolar?
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