What volume will a sample of hydrogen occupy at 28.0 oc if the gas occupies a volume of 2.23 ml at a temperature of 0.0 oc? assume that the pressure remains constant. (remember to change to kelvin)?

Which metal exist in liquid state and can be cut with knife ?

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

What is the mass of phosphorous in a 51-kg person