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A pycnometer is a glass apparatus used for accurately determining the density of a liquid. When dry and empty, a certain pycnometer had a mass of 27.314 g. When filled with distilled water at
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- A 區 88%1 G € T 9 Q1. An organic chemist isolates a colourless liquid from a petroleum sample. She places the liquid in a flask and puts the flask in a boiling water bath, which vaporizes the liquid and fills the flask with gas. She closes the flask, reweighs it, and obtains the following data: Volume of flask (V) = 213 mL Mass of flask+gas = 78.416 g T=100°C P=754 torr (760 torr in 1 atmosphere) Mass of empty flask = 77.834 g Calculate the molar mass of the liquid, carefully converting to appropriate units, where necessary. (Note: Gas constant; R = 0.082057 L.atm.K'.mol¹) 80 5:38 Wed, 29 May E III III B I U 0 о 29 A+ T + 12▾ E▾ W 閃 == 191 < 0 <arrow_forwardIn our chemistry laboratory class, the formula for surface tension given is y=mg/2(pi) x r x f where y=surface tension, m= mass of the drop, g= gravitational acceleration, pi is 3.1415, r= outer radius of burette, f=correction factor. Now I searched the internet and it says that the unit for surface tension is kg x m/s^2. The problem is I have grams for the mass of the drop and that the outer radius of the burette is in centimeter while the gravitational acceleration is in meter. What will happen is like this: (1 g x 9.8 m/s^2) / 2 (3.1415) x 0.15 cm x 0.74643 (correction factor no unit) As you can see, if I don't cancel m and cm, the unit will be g x cm x m x s^2. However if change the radius of the burette into meter, it will cancel, the unit will be g x s^2 (missing meter). What can I do to get kg x m/s^2 as the unit for final answer?arrow_forwardA chemist prepares a solution of silver(I) nitrate (AgNO3) by measuring out 1.9 × 10 μmol of silver(I) nitrate into a 500. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mmol/L of the chemist's silver(I) nitrate solution. Be sure your answer has the correct number of significant digits. mmol L X 3arrow_forward
- Density of an aqueous solution of nitric acid is 1.43 g/mL. If this solutioin contained 36.0% nitric acid by mass, what volume of solution would be needed to supply 1.50 mmol of nitric acid?arrow_forwardDennis obtained a clean, dry stoppered flask. He determined the mass of the flask and stopper to be 32.634 g.He then filled the flask with water and determined the mass of the full stoppered flask to be 59.479 g. Based on the temperature of the water, Dennis found the density of water in the Handbook of Chemistry and Physics to be 0.998730 g/mL. Calculate the volume of the flask.arrow_forwardA manufacturer of paint claims that a gallon (3.78 L) of latex paint can cover 365 ft2 of the surface of a wall in a single coating. The paint manufacturer also claims that one single coating of an entire wall will be 3.40 mm thick. Is this a case of false advertising? Yes or No? Elaborate your answer by providing a calculation (handwritten, upload a pdf). You may use the following conversions: 12 in = 1 ft, 2.54 cm = 1 inarrow_forward
- PbO2(s)+HCl(aq)→Cl2(g)+PbCl2(aq)+H2O(l)PbO2(s)+HCl(aq)→Cl2(g)+PbCl2(aq)+H2O(l) Express your answer as a chemical equation. Identify all of the phases in your answer. Balance each chemical equation.arrow_forwardA chemist prepares a solution of copper(II) fluoride CuF2 by measuring out 0.159μmol of copper(II) fluoride into a 250.mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in /molL of the chemist's copper(II) fluoride solution. Be sure your answer has the correct number of significant digits. mol/Larrow_forwardDennis obtained a clean, dry stoppered flask. He determined the mass of the flask and stopper to be 32.634 g. He then filled the flask with water and determined the mass of the full stoppered flask to be 59.479 g. Based on the temperature of the water, Dennis found the density of water in the Handbook of Chemistry and Physics to be 0.998730 g/cm3. Calculate the volume of the flask.arrow_forward
- Oil Ethanol and Water Water A student combines equal volumes of ethanol and water in a beaker and stirs the mixture. The student repeats this process but with equal volumes of oil and water in a different beaker. The student observes the contents of the beakers after they are mixed, as shown in the diagram. Which TWO of the following statements are consistent with the student's observations? Ethanol molecules and water molecules are both polar, so they mix well with each other. Ethanol molecules are nonpolar and water molecules are polar, so they mix well with each other. Oil molecules and water molecules are both polar, so they do not mix well with each other. D Oil molecules are nonpolar and water molecules are polar, so they do not mix well with each other.arrow_forwardthe concentration of carbon monoxide in an urban apartment is 48.0 ug/m^3. what mass of carbon monoxide in grams is present in a room measuring 9.0ft*14.5ft*18.8ftarrow_forward5.49x10^-82 is wrong.arrow_forward
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