Homer uses 6.0 strings of Christmas lights, each string of lights uses 25.0 W, Homer leaves his Christmas lights on for 20 days straight (24/7). How much energy does Homer use?

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

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.

The biosphere of the earth is made up of what compound? organic or inorganic?