A 02436-g sample of an unknown substance was dissolved in
A 0.2436-g sample of an unknown substance was dissolved in 20.0 mL of cyclohexane. The density of cyclohexane is 0.779g/mL. The freezing-point depression was 2.5ºC. Calculate the molar mass of the unknown substance. (Kf cyclohexane = 20.0ºC/m)
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A block of wood, with density 780 kg/m3 has a cubic shape with wides 0.330 m long. A rope of negligible mass is used to tie a piece of lead to the bottom of the wood. What is the mass of the lead
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A 0.2436-g sample of an unknown substance was dissolved in 20.0 mL of cyclohexane. The density of cyclohexane is 0.779g/mL. The freezing-point depression was 2.5ºC. Calculate the molar mass of the unknown substance. (Kf cyclohexane = 20.0&ord
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a force of magnitude 7.50 N pushes three boxes with masses m1 = 1.30 kg, m2 = 2.80 kg, and m3 = 5.30 kg. Find the magnitude of the contact force between boxes 1 and 2
What is the future value of annual payments of $5,931 for 17 years at 4 percent?
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