Mary walked north her home to sheila home is 4.0 away then turned right and walked another 3.0 kilometers to the supermarket which is 5.0 kilometers from her own home she walked the total distance in 15 hours what were her average speed and average velocity

When a chemist collects hydrogen gas over water, she ends up with a mixture of hydrogen and water vapor in her collecting bottle if the pressure in the collecting bottle is 97.1 kilopascals and the vapor pressure of the water is 3 2 kilopascals, what is the partial pressure of the hydrogen?