A collection of 0.002823 grams of hydrogen gas over water in an eudiometer at 23 degrees celsius. The atmospheric pressure is 794 of mmHg. What volume of dry hydrogen gas would be collected?

Which statement is a reason to support population regulation? a) it is unethical for us to control birth control rates b) humans have the freedom to produce as many children as desired c) the gap between the rich and poor has been narrowing since 1960 d) billions more people on the earth will intensify many environmental and social problems

Which statement best explains the relationship between an area is geography and the temperature of its surface water

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.