In general, should atmospheric pressure increase or decrease as altitude increases?

Endeleev saw trends in the physical and chemical properties of elements when he organized them by

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

A50.0 ml sample of gas at 20.0 atm of pressure is compressed to 40.0 atm of pressure at constant temperature. what is the new volume? 0.0100 ml 0.325 ml 25.0 ml 100. ml