How does the amount of matter change when water changes state?

the amount of matter always increases as water changes state.
the amount of matter always decreases as water changes state.
the amount of matter stays the same as water changes state.
the amount of matter varies depending on how water changes state.

Which of the following elements is in the same period as phosphorus? a. carbon c. nitrogen b. magnesium d. oxygen select the best answer from the choices provided a b c d

Consider the growth of a 20-nm-diameter silicon nanowire onto a silicon wafer. the temperature of the wafer surface is maintained at 2400 k. assume the thermal conductivity of the silicon nanowire is 20 wm-1k-1 and all its surfaces including the tip are subjected to convection heat transfer with the coefficient h = 1×105 wm-2k-1 and t∞ = 8000 k. when the nanowire grows to l = 300 nm, what is the temperature of the nanowire tip (t (x =

Coal contains energy. a. light b. kinetic c. chemical d. mechanical