How does the mass of an object change when it acquires a positive charge?

Which property of fossils allow scientists to determine the relative rock ages..

How are calculation for velocity and speed different

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.