Which statement about gases is true?
they are made up of particles that always move very slowly.
they are made up of particles that travel in a curved path when in motion.
they are made up of hard spheres that vibrate quickly in stationary positions.
they are made up of hard spheres that are in random motion.

What is the number of moles in 15.0 g ash3?

What state of matter is ice a. liquid b. element c. solid d. gas

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided