Question

1-What solvent you use to determine the density of zinc chloride?

2-The density of a solid with a melting point of 42 to 44 C was determined to be 0.87+- 0.02 g\mL. what is the solid?

3-The density of a liquid whose boiling point is 55 to 57 C was determined to be 0.77+- 0.05 g\mL. what is the liquid?

4-Is diphenylmethane a solid or a liquid at room temperature?

5-What solvent would you use to measure the density of napthalene?

6-Convert your densities to Kg/L and compare those value with the ones in g/mL?

7-if air bubbles were trapped in your soild beneath the liquid level in your density determination, what error would result in the volum measurement? what would be the effect of this error on the calculated density?

8-A liquid unknown was found to be insolube in water and soluble in cyclohexane and alcohol; the unknown was found to have a boiling point of 58C at 670 mm Hg. what is the substance? what could you do to confirm your answer?

9-A liquid that has a density of 0.80+- 0.01 g/mL is soluble in cyclohexane. what liquid might this be?

10-Osmium is the densest element known. what are it is density and melting point?

11-What are the formula, molar mass, and color of potassium permanganate ?

Answer 1

1	What solvent you use to determine the density of zinc chloride?	Water
2	The density of a solid with a melting point of 42 to 44 C was determined to be 0.87+- 0.02 g\mL. what is the solid?	Lauric Acid
3	The density of a liquid whose boiling point is 55 to 57 C was determined to be 0.77+- 0.05 g\mL. what is the liquid?	Acetone
4	Is diphenylmethane a solid or a liquid at room temperature?	Liquid as the bp is 264 °C
5	What solvent would you use to measure the density of napthalene?	Density is related to the temperature / 0.9625 g/cm3 (100 °C)
6	Convert your densities to Kg/L and compare those value with the ones in g/mL?	1 kg/dm3 = 1 kg/L = 1000 g/1000 mL
7	if air bubbles were trapped in your soild beneath the liquid level in your density determination, what error would result in the volum measurement? what would be the effect of this error on the calculated density?	The elevated results of density are observed as the volume gets increased. This error leads to the increased density values.
8	A liquid unknown was found to be insolube in water and soluble in cyclohexane and alcohol; the unknown was found to have a boiling point of 58C at 670 mm Hg. what is the substance? what could you do to confirm your answer?	Propionaldehyde
9	A liquid that has a density of 0.80+- 0.01 g/mL is soluble in cyclohexane. what liquid might this be?	Propionaldehyde
10	Osmium is the densest element known. what are it is density and melting point?	Melting point -   3306 K ​(3033 °C, ​5491 °F) Density near r.t. 22.59 g/cm3
11	What are the formula, molar mass, and color of potassium permanganate ?	Molar mass: 158.034 g/mol Formula: KMnO4 The crystals are dark brown/ black in colour and it dissolves in water to give intensely pink or purple solutions, the evaporation of which leaves prismatic purplish-black glistening crystals