What was the average speed in km/h of a car that travels 788 km in 7.1 h?

The vapour pressure of benzene is 53.3 kpa at 60.6 °c, but it fell to 51.5 kpa when 19.0 g of a non-volatile organic compound was dissolved in 500 g of benzene. calculate the molar mass of the compound.

In a series circuit the __ is the same at every point

Calculate a pendulums frequency of oscillation (in hz) if the pendulum completes one cycle in 0.5s.