5
QuizMultiple Choice

States and Changes of Matter — Test

Question 5 • Chemistry

Water’s molar mass is 18 point 0 1 g over mol The molar mass of glycerol is 92 point 0 9 g over mol At 25 times degree C , glycerol is more viscous than water. Which substance has the stronger intermolecular attraction?

Answer
A
glycerol because it is more viscous and has a larger molar mass
B
water because it has a lower molar mass
C
glycerol because it has a larger molar mass
D
water because it is less viscous and has a lower molar mass

Explanation

At the same temperature, greater viscosity generally indicates stronger intermolecular attractions because the molecules resist flowing past one another. Glycerol is more viscous than water at 25 °C, so glycerol has the stronger intermolecular attraction. Its larger molar mass is also stated, but viscosity is the key evidence for the comparison.

AI-written and checked against the verified answer.

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