Which properties are characteristics of pure substances, and which are characteristics of mixtures? Pure Substances Mixtures

May be multiple states of matter
Exist in the same state of matter
Can be seperated physically
Have consistent properties
Cannot be seperated physically
Cannot be a single element

The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.

Air initially at 0.75 bar, 1000 k, and occupying a volume of 0.12 m^3 undergoes two processes. process 1-2: the air is compressed isothermally until the volume is halved. process 2-3: the air undergoes a constant pressure process until the volume is halved again. assume ideal gas behavior. a) determine the mass of the air, in kg. b) the work and the heat transfer for each of the two processes, in kj. (100 kj = 1 bar . m^3)

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87