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vodka [1.7K]
2 years ago
7

A (non-aqueous ) solution is found to have a molarity of 2.50 molal and experiences a freezing point depression of 5.20 degree C

. What is kf of the solvent (in degrees c/m) ?
Chemistry
1 answer:
Crazy boy [7]2 years ago
6 0

Answer:

Kf for the solvent is 2.08°C / m

Explanation:

Formula for lowing point depression is:

ΔT = Kf . m

Then, the ΔT is 5.20°C and the molality is found to be, 2.50 m

5.20°C = Kf . 2.50 m

5.20°C /2.50 m = Kf  →  2.08°C / m

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Sam believes the rock is more denser than the pencil. He measured the mass of the rock to be 8.5 grams and volume to be 4.5mL. H
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Read 2 more answers
2C4 H10 + 13O2 -→ 8CO2 + 10H2O If 356 moles of O2 are available to react, how many moles of CO2 will fom?
nlexa [21]

Answer:

Answer:

The mole ratio of C₄H₁₀ and CO₂ is 2 : 8, which  simplifies to 1 : 4.

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2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O

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2 mol C₄H₁₀ : 8 mol CO₂ , which dividing by 2, simplifies to

1 mol C₄H₁₀ : 4 mol CO₂, or

1 : 2.

Explanation:

5 0
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