MULTIPLE CHOICE PROBLEM SOLVING The boiling point of 350mL of substance A was determined to be 97.5oC. Based on this information, the boiling point of 1000L of substance A is O Higher than 97.5 degrees Centigrade O Lower than 97.5 degrees Centigrade O Undetermined O Equal to 97.5-degrees Centigrade
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- The addition of 250 mg of naphthalene in benzene elevated the boiling point of 100g of benzene by 0.05 degrees celcius at 1.01x10^5 Pa. Calculate the molar mass of naphthalene molecules. Benzene has a booling point of 80.01 celcius and the Kb for benzene is 2.53 degrees celcius -kg/mol.1. An organic student did an experiment extracting benzoic acid from a mixture of other organic substances. Other analyses of the obtained sample confirmed the presence of benzoic acid. The student also measured the melting point of the white solid, 117.4-121.6 oC. The literature mp of benzoic acid is 122.3oC. What can you conclude about the sample? Select one. Group of answer choices The sample of benzoic acid contains soluble impurities. The student obtained a good yield of benzoic acid. The sample of benzoic acid contains insoluble impurities. The student obtained pure benzoic acid from the extraction. The student obtained a poor yield of benzoic acid. 2. Which phenomenon are sometimes confused with melting during mp analysis? Select all that apply. Group of answer choices decomposition cracking shaking sagging/shrinking sweating solidifying 3. Study the bond types in the compound shown. Select the type(s) of intramolecular force(s) you predict the substance to exhibit. Select all…What mass (in kg) of ethylene glycol would be needed to add to 5.0 kg of water to raise the boiling point of water by 2.0 oC? Assuming, Kbp H2O = +0.5121 oC/m and Kfp H2O = -1.86 oC/m.
- Create your scale on the x and y axes. Estimate the boiling point of the mixture which is composed of 80% A and 20% B What will be the vapor composition?a) If a liquid with x(Ge)=0.4 is cooled, at what temperature does the first solid appear? b) What is the composition of this first solid? c) Describe the phases present at the eutectic temperature when a 50/50 mix of Al and Geat room temperature is heated. Be specific.Given the following mixture of two compounds 30.00 g of X (liquid) (MW =58.00 g/mol)(density 1.088 g/mL) and 880.00 g of Y (50.00 g/mol))(density 0.808 g/mL), calculate the mass percent of X. Given the following mixture of two compounds 35.00 mL of X (MW =80.00 g/mol)(density 0.945 g/mL) and 735.00 mL of Y (80.00 g/mol))(density 0.810 g/mL). The vapor pressure of pure Y is 47.00 torr. Calculate the vapor pressure of the solution.
- You are handed a 15.85% by mass aqueous KCl (m.m. = 74.5513 g mol–1) solution (at 25 °C). Assume the density of the solution is that of pure water (dsolution = 1.000 g mL–1). The ebullioscopic constant (Kb) for water is 0.513 °C m–1. The cryoscopic constant (Kf) for water is 1.86 °C m–1. The vapor pressure of pure water is 0.0313 atm. Determine the following: Boiling Point in degrees CelciusA student caried out this experiment and obtained the following data: Patm = 656.7 mm Hg Vinitial = 0.30 mL Mass of Alka-Seltzer sample = 0.123 g TH2O = 27.0°C Vfinal = 17.05 mL Determine the following: a. What is the balanced chemical equation for this reaction? (Hint: See Equations 1-4.) b. What is the vapor pressure of water? c. What is the partial pressure of carbon dioxide?What is the boiling point of the automobile radiator fluid prepared by mixing 1.02 L of ethylene glycol (HOCH2CH2OH, density = 1.114 g/mL) with 1.04 L of water (density = 1.000 g/mL)?
- The table below shows temperature/composition data collected for a mixture of methylbenzene (M) and octane (O) at 1 atm. Recall that x stands for the mole fraction in the liquid and y stands for the mole fraction in the vapor in equilibrium. The boiling points for methylbenzene (M) and octane (O) are 110.60C and 125.60C, respectively. Construct the phase diagram with Temperature vs. xM. What is the composition of the vapor in equilibrium with the liquid of composition (a) xM = 0.250 and (b) xO = 0.250. T (0C) 110.9 112.0 114.0 115.8 117.3 119.0 121.1 123.0 xM 0.908 0.795 0.615 0.527 0.408 0.300 0.203 0.097 yM 0.923 0.836 0.698 0.624 0.527 0.410 0.297 0.164A solution of methylene chloride (CH2Cl2) and ethanol (CH3CH2OH) that is 25.% methylene chloride by mass is boiling at 69.7°C. The vapor is collected and cooled until it condenses to form a new solution. only round for final anwer not during math please! Calculate the percent by mass of methylene chloride in the new solution. Here's some data you may need: normal boiling point density vapor pressure at 69.7°C methylene chloride 40.°C 1.3gmL 1949.torr ethanol 78.°C 0.79gmL 545.torr Be sure your answer has 2 significant digits. Note for advanced students: you may assume the solution and vapor above it are ideal.You synthesized a sample of tetramethylammonium triiodide and managed to measure the melting point. However, the melting point deviates from the ideal melting point for tetramethyl-ammonium tri-iodide, which is 117 degrees C. This suggests that your sample may be impure. Unfortunately, you ran out of time and were unable to carry out the gravimetry. Your demonstrators agreed to help you out, but instead of using gravimetry, they carried out the elemental analysis of your product. The sample contains C - 9.27 %, H -2.33 %, and N - 2.70 %. How many iodine atoms does your sample have according to this analysis?