Cyclohexane has a freezing point of 6.50 ∘c and a kf of 20.0 ∘c/m. what is the freezing point of a solution made by dissolving 0.694 g of biphenyl (c12h10) in 25.0 g of cyclohexane?

How many moles are in 7.2 x 10^23 carbon molecules? (*round to the nearest hundredth and include the unit "mol c" after your number) question 6 options:

Which metal exist in liquid state and can be cut with knife ?

Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3