Heliox is a mixture of gases and is used in medicine to help people with breathing problems such as severe asthma. A typical heliox mixture contains He at a partial pressure of 0.75 atm and O2 at a partial pressure of 0.35 atm. (a) What is the total pressure of the Heliox mixture?
(b) What fraction of the molecules in Heliox are helium?
(c) Draw a particulate representation of Heliox that contains 10 particles.

According to each substances heat of fusion, which of the items below requires more heat to be added per gram of substance to go from solid to liquid? silver sulfur water lead

Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.