Asample of oxygen gas is sealed in container x. a sample of hydrogen gas is sealed in container z. both samples have the same volume, temperature,
and pressure. which statement is true?
(1) container x contains more gas molecules than container z.
(2) container x contains fewer gas molecules than container z.
(3) containers x and z both contain the same number of gas molecules.
(4) containers x and z both contain the same mass of gas.

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

The p sub shell can hold up to 8 electrons in an atom. true or false?

Many pharmaceutical drugs are organic compounds that were originally synthesized in the laboratory. which two scientific disciplines are bridged by pharmaceutical drugs? chemistry and forensics chemistry and medicine biology and forensics biology and criminology