Practice question

Fill in the blank

Question

The freezing point of 80 g of acetic acid (freezing point constant 3.9 K kg mol ⁻¹ ) was lowered by 7.8 K due to the addition of 20 g of a compound. The molar mass of the compound is g mol ⁻¹ (rounded off to closest integer). (NAT)

Explanation

Biologically, molecular bonding operates via hybridization and orbital overlap dictate geometry and reactivity. Thus Option NAT is appropriate since it satisfies bonding and stability criteria, reinforcing core concepts taught in chemistry.

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