Based on the data, which is the best solvent for the unknown solid A? Unknow A: Water Ethanol Ethyl Acetate Heptane Toluene Room Temp Dissolved Dissolved Solid Solid Solid Hot Solid Solid Dissolved Solid Solid Initial mass: 1.08g Recovered mass: 0.968g Fast melting point: 130°C-134°C Slow melting point: 134°-136°C Mixed melting points: With Benzoin: 134°C - 136°C With Malonic Acid: 120°C - 124°C O water O ethanol O ethyl acetate O heptane O toulene

Rank the following from strongest intermolecular attraction to weakest intermolecular attraction. Strongest IM attraction v [ Choose ] C5H12 with itself 2nd strongest IM attraction KF with water CH4 with itself PH3 with itself 3rd strongest IM attraction NH3 with itself 4th strongest IM attraction [Choose] 5th strongest (weakest) IM attraction ( Choose )

5-75 The heat of vaporization of liquid Freon-12, CCI2F2, is 4.71 kcal/mol. Calculate the energy required to vaporize 39.2 g of this compound. The molecular weight of Freon-12 is 120.9 amu.

CHEMWORK For each of the following pairs, predict which substance is more soluble in water. Substance 1 CH3CN CH3CH₂OH CC14 CH3OCH 3 CH3NH2 NH3 Submit Show Hints Compares to Substance 2 CH3CH3 CH3(CH2) 14CH2OH CH₂Cl2 CH3CO₂H NH3 PH3

Rank the following organic compounds in order of decreasing their boiling points: CH3CH2COOH CH3COOCH3 CH3CH2CH2OH CH3CH2CONH2 || II IV Select one: ||>l>I||>IV l>IV>III>I| IV>l>II>III IV>l>IIl>I|

Rearrange the in order of lowest - highest boiling point Ch3COOH, (CH3)2C=O, CH3CH2CH2CH3

Which of the melting point capillaries in the picture below is filled to the proper level for taking a melting point on a MelTemp melting point apparatus? OB OC OA 12 01489 5

a) Rank the following in order of increasing boiling point. он OH ČH3 A. C

Arrange the following compounds in order of increasing boiling point. Br HO A D

The table below shows three organic compounds with their relative molecular masses listed. Chemical Formula Relative molecular mass Boiling point/C A CH3CH2CH2CH2CH3 72 36 B CH3CH2OCH2CH3 74 X C CH3CH2CH2CH2OH 74 Y (a) Comparing A and B, predict if X would be greater than, similar to, or less than 36C. Explain your prediction. (b) Comparing B with C, predict if Y would be greater than, similar to, or less than X. Explain your prediction.