What is the Law of Conservation of Mass/Matter? 20
O Mass/Matter cannot be created or destroyed.
O Mass/Matter can be created by humans.
Mass/Matter can be destroyed by humans.
O The Law says the world is flat.
In regards to the Scientific Method, what does PHEOC stand for?
20 po

What is the temperature of one mole of helium gas at stp?

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.

Which one of the following bonds would you expect to be the most polar? a) b–h b) n–h c) p–h d) al–h e) c–h