The crystal lattice structure of ionic compounds is responsible for which set of characteristic properties?

electrically charged, good conductor of heat and electricity, low melting and boiling point

good conductor of heat, ductile, malleable, high melting and boiling point

found in many states at room temperature, low melting and boiling point

liquid, flowing, alkaline, very low melting and boiling point

solid, hard yet brittle, very high melting and boiling point

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.

Carbon 14 is a naturally occurring stable