Which of the following situations describes a change that will result in a new kind of matter with different characteristics?
a bucket full of nails rusts in a damp basement
O a puddle of water freezes into a sheet of ice
a sculptor chips away bits of marble to make a statue
O a cook slices vegetables into tiny pieces to make soup

In a sample of oxygen gas at room temperature, the average kinetic energy of all the balls stays constant. which postulate of kinetic molecular theory best explains how this is possible? a. attractive forces between gas particles are negligible because the particles of an ideal gas are moving so quickly. b. collisions between gas particles are elastic; there is no net gain or loss of kinetic energy. c. gases consist of a large number of small particles, with a lot of space between the particles. d. gas particles are in constant, random motion, and higher kinetic energy means faster movement.

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

Acrystal that absorvd water from air is (blank)a. aqueousb. homogenousc. hygroscopicd. efflorescent