Recall that a precipitate formed in the Fe3 (aq) solutions when either NaOH(aq) or NH3(aq) was added. Given this, explain why a precipitate formed when NaOH(aq) was added to the Ca2 (aq), but no reaction occurred when the NH3(aq) was added to the Ca2 (aq) solution. Hint: Think about relative solubilities and the relative concentrations of hydroxide ions in NaOH(aq) versus NH3(aq).

Mrs. smith ordered a root beer float (vanilla ice cream + root beer). mrs. smith noticed that the three states of matter (solid, liquid, and gas) all existed simultaneously in her root beer float. a. identify each phase of matter in the root beer float. b. describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? ) c. identify one phase change you would see in a root beer float and described what causes this change.

What is conserved in the reaction shown below? h2(g) + cl2 (g) --> 2hcl(g)a. mass onlyb. mass and moles onlyc. mass, moles, and molecules onlyd. mass, moles, molecules, and volume

How many liters of oxygen gas, at standardtemperature and pressure, will react with 35.8 grams ofiron metal? 4 fe (s) + 3 o2 (g) → 2 fe2o3 (s)