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QUESTION 5 Determine the mass in grams of pentane that must be added to 67 g...
מו Calculate the mass of glucose (C6H606) that must be added to 100 g of water to give a solution whose freezing point is -3.8°C. The freezing point depression constant of water is 1.86 °C/m. The molar mass of glucose is 180.16 g/mol Give your answer in grams to 3 significant figures
Calculate the mass of 6-methylazulene (C11H10) that must be added to 350. g of benzene (C6He) to give a solution that freeze at 3.65 °C 17.9g 35.5 g 49.5 g 97.7g There is no amount of 6-methylazulene that will cause the benzene solution to freeze above 0 °C.
A 3.00 g sample of [Co(NH3),cicl, is dissolved in water. Calculate the mass (in grams) of AgCl(s) produced when excess AgNO, is added to the solution. (Do not include units in your answer. If you round during your calculations make sure to keep at least 3 decimal places. Report your answer to 2 decimal places.) Answer:
How many grams of MgCl2 (molar mass = 95.2 g/mol) should be added to 300 grams of water to give a solution that freezes at -3.00°C? Kf of H2O is 1.86°C/m.
The combustion of pentane can be represented by the following equation: __C5H12 (g) + __O2(g) → __CO2(g) + __H2O(g) Balance the equation and answer the next three questions. 1. If 270. g of C5H12 and 970. g O2 react, which reactant is used up first? (enter pentane or oxygen) 2. What is the mass of carbon dioxide produced? (Give your answer to 3 sig figs.) grams 3. What is the mass of water produced?(Give your answer to 3 sig figs.)...
When 12.6-grams of an unknown compound is placed in 0.116-kg of benzene, the freezing point is changed by 2.34°C. The value of Kf= 4.90°C/m for benzene. Determine the molar mass of the unknown compound. Answer to 1 decimal place and include your units. Answer: Determine the molality of a solution when 32.3 grams of ethanol, C2H5OH (Molar mass = 46.08 g/mol) is dissolved in 0.947 kg of water. Answer to 2 decimal places. Answer: Find the freezing point of a...
A container containing 6.19 L of a gas is collected at 244 K and then allowed to expand to 23.4 L. What must the new temperature be in order to maintain the same pressure? Express your answer in units of K. You do not need to enter the unit. When 16.8-grams of an unknown compound is placed in 0.176-kg of benzene, the freezing point is changed by 1.93oC. The value of Kf= 4.90oC/m for benzene. Determine the molar mass of the...
How many grams of NH4Cl must be added to 0.100 L of 0.426 M NH3 to produce a buffer solution with pH= 9.34 ? pKa (NH4Cl) = 9.24 Units are not required on the answer. Round your answer to two decimal places.
What mass (in grams) of sodium acetate (CH,COONa) must be added to 100.00 mL of a 0.118 M solution of acetic acid in order to prepare a buffer solution with a pH of 4.50? The K, of acetic acid is 1.8 x 10-5 Mass of sodium acetate =
What mass of ethylene glycol (C2H6O2) must be added to 211.0 g of water to obtain a solution with a boiling point of 102.6 ∘C? What mass of ethylene glycol () must be added to 211.0 of water to obtain a solution with a boiling point of 102.6 ? Show work. Options are: a) 1.1 g b) 67 g c) 2.62×103 g d) 0.0241 g