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Calculate the molality of a sodium chloride brine solution that exhibits a density of 1.13 g / mL and a mass percent of 17.7% at room temperature. b. Calculate the freezing point of this sodium chloride brine solution mentioned in Part "a" above. c. Calculate the molarity of the same sodium chloride brine solution. (Part a). d. Calculate the mole fraction for water in a totally different sodium chloride solution (not Part a), if 20.0 g of this table salt (NaCl) was added to 93. mL of water to create a 100. mL of brine solution. The density of the pure water at this room temperature was accurately pre-determined to be 0.9986 g per mL. e. Calculate the vapor pressure of water above the brine solution mentioned in Part "d" above. f. Calculate a final molarity (M) for a solution if 10. mL of Part "d" is diluted to 0.20 L with pure water.
a 10 ml sample of a solution of pbclo32 was diluted with water to 21 ml. a 10 ml sample of the dilute solution was
How many Valence electrons does a balanced atom of Sodium have? What is the net charge on each ion?
A student wrote the reaction scheme below for the grignard synthesis of triphenylmethonal. Explain to the student why this representation of the reaction would not yield the desired product
What is the density(in gm/ml) of a 3.60 M aqueous sulphuric acid solution that is 29%
for a first-order reaction. at 750 k 15 of a sample of cyclopropane changes to propene in 6.8 minutes. what is the
Calculate the value of Avogadro's number to three significant figures based on these data. (Note: the value may differ from the tabular value).
the external pressure is constant at 1.00 atm; and 4) the heat of vaporization of water is 2.26 kJ/g. What is q for the vaporization of 1.00 g of liquid water at 1.00 atm and 100C, to the formation of 1.00 g of steam at 1.00 atm and 100C
For 100 g mol of a gas mixture of 75 mol % CH4 and 25% H2, calculate the total heat of combustion of the mixture at 298 K and 101.32 kPa, assuming that combustion is complete.
if the freezing point of a 0.107 m CH3COOH solution is -0.200°C, calculate the percent of the acid that has undergone ionization.
determine the percent yield for the reaction between 3.74g of na and excess o2 if 5.35g of na2o2 is
The freezing-point depression of a 0.100 m (molality) MgSO4 solution is 0.225 degrees Celsius. Determine the experimental van't Hoff
Benkart's Tie Store has fixed costs of $180,000. Tires sell for $75 each and have a unit variable cost of $30. What is Benkart's break-even point in units?
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