Food Quiz

29. You live in Morristown, NJ at 1 atmosphere pressure and want to add pasta to a pot containing 2000 g of boiling water at 103°C. How much NaCl should be added to elevate your water's boiling point from 100°C to 103°C? The molal boiling point elevation constant for water is 0.512°C/m. Set Up Format Concept Math

When dissolving an ionic solid in water, dynamic equilibrium is reached whenGroup of answer choices rate of evaporating < rate of bubbling. rate of dissolution < rate of recrystallization. rate of dissolution > rate of recrystallization. rate of dissolution = rate of recrystallization. rate of condensing > rate of dissolving.

Suggest three ways to increase the rate at which zinc dissolves in sulfuric acid. O Use large pieces of zinc to decrease the exposed surface area. Increase the concentration of sulphuric acid. None of these are appropriate choices. Increase the temperature. Decrease the temperature. O Use powdered zinc or zinc filings to increase the exposed suface area. O Decrease the concentration of sulphuric acid.

When you open a bottle of soda, bubbles rapidly form and gas fizzes out. What is the best explanation of this?  Group of answer choices (a) Gas that was trapped at the top of the bottle between the cap and the surface of the liquid escapes immediately and 'draws' liquid soda as it escapes, creating the illusion of bubbling.    (b) The act of opening the bottle 'dislodges' tiny, nearly invisible gas bubbles that were clinging to the side of the container. They quickly condense into larger bubbles and escape.   (c) Warm air from outside the bottle heats the soda, decreasing the solubility of the CO2 in the soda and causing it to bubble out.   (d) When the bottle is opened, the pressure of CO2 gas above the liquid rapidly drops, which significantly decreases the solubility of CO2 in the soda, causing it to bubble out.    (e) H2CO3 in the soda reacts with water vapor in the air, forming CO2 that quickly bubbles out.

Question 16 In which of the following solvents would you expect KBr to be most soluble? C6H14 (hexane) CH3CH2OH (ethanol) C6H6 (benzene) CCI4 (carbon tetrachloride) C6H12 (cyclohexane)

Identify the solid that is LEAST soluble in water. Ag3PO4 Ksp = 8.89*10-17 CaCrO4 Ksp = 7.1*10-4 Cr(OH)3 Ksp = 6.3*10-31 %3D PbSO4 Ksp = 2.53*10-8 « Previous Quiz save MacBook Air 000 000 F3 F4 F5 F6 F7 $ & 4 6. * LO # 3

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