List one physical change for each item: bread, milk, apple, and egg. How could you be sure these are physical changes?

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

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?

50 points - answer entirely - will reward brainliest