If you are given an unknown liquid that is 1.0 l and has the mass of 500 grams which of the substance would it be. distilled water density= 1.0g/cm^3, propane density 0.494 g/cm^3, salt water density 1.025 g/cm^3 or liquid gold 17.31 g/cm^3?

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 the percent composition of ca(oh)2? 37.7% ca, 53.0% o, and 10.3% h 45.5% ca, 38.2% o, and 16.3% h 54.0% ca, 43.0% o, and 2.7% h 64.7% ca, 27.0% o, and 8.3% h

Can someone me with 3 and 4 plz. this is for masteries test.