Dr. Nation has 0.75 mol of an unknown gas with pressure of 500 mmHg and a volume of 290 mL. What is the temperature of this unknown gas?
O 3.1k
9.3K
78 K
30.2 K

On a distance vs time graph the line of an object at rest is a

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

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.