Question

In a hydrogen atom, the electron moves around the nucleus in a circular orbit of radius 51011m.510-11m. Its time period is 1.510161.510-16 seconds. The current associated with the electron motion is ......

Answer 1

At stp (273 k and 100 kpa), 1.15 dm3 of a gas has a mass of 3.96 g. Determine the molar mass of the gas.

The density of a gas is measured at 1.853 g / L at 745.5 mmHg and 23.8 °C.