Which correct step in the scientific method did Victor most likely do before the step described here? this is for comprehensive science with Brad ddugan (will give brainleiest for correct answer)

Harvey mixes two liquids. which observation of the new mixture most likely indicates a precipitate is forming?

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?

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.