Question

when 20 grams of an unknown non electrolyte compound id dissolved in 500g of benzene,the freezing point of the resulting solution is 3.77k .the freezing point of pure benzene is 5.444k and kf for benzene is 5.12k kg/mol.what is the molar mass of the unknown compound?
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Answer 1

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Given: Total distance travelled = 400 m

Total displacement = 0, as he returns to his original position.

Total time = 25 seconds.

Average speed = ?, Average velocity = ?

Average speed = Total distance covered / Total time taken

=> Average speed = 400 / 25

=> 16 m/s

Average velocity = Total displacement / Total time taken

=> 0 / 25

=> 0 m/s