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Nataly_w [17]
3 years ago
14

Why do substances with weak intermolecular forces form solids at low melting points?

Chemistry
1 answer:
Advocard [28]3 years ago
7 0
To make any substance solid, molecules must come very close to each other. Substances with weak intermolecular forces have weak bonding. Hence to make their molecules come close to each other, we must provide low temperature. 
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Snape grows tired of these conceptual questions and thinks it's time for a problem. What is the retention factor if the distance
MAVERICK [17]

Answer:

The Retention factor (rf) value is = 0.2

Explanation:

  • Retention factor (Rf) is factor used substances that could be separated using Chromatography. Retention factor determines how fast the component can move on the chromatogram (stationary phase) after elution. Elution occurs when mobile phase (solvent) moves across the stationary phase when the solute has been spotted on the origin.
  • Retention factor (Rf) ranges from value between 0 and  1. The closer the value to 1, the faster it can move upon elution. Rf can be calculated.
  • Rf value = distance moved by the solute / distance moved by the solvent

             = 0.40cm / 2.00cm

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6 0
3 years ago
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8 0
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6 0
2 years ago
Does yeast need air to release carbon dioxide
Mashcka [7]
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8 0
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How many grams of sucrose would you add to water to make a total of 2.1 L of 9 % solution (mass per volume)? Make your answer's
s344n2d4d5 [400]

Answer : The mass of sucrose added to water will be, 189.0 grams.

Explanation :

As we are given that 9 % solution (mass per volume) that means 9 grams of sucrose present in 100 mL volume of solution.

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Now we have to determine the mass of sucrose in solution.

As, 100 mL of solution contains 9 grams of sucrose

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8 0
3 years ago
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