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Calculate the vapor pressure of water at 35 degrees Celsius given delta Hvap= 44.0 kJ/mol and the vapor pressure of water at 25 degrees Celsius is 23.8 torr
If 69.5 kJ of heat is applied to a 1034 g block of metal, the temperature of the metal increases by 11.4°C. Calculate the specific heat capacity of the metal in J/g°C.
The hot combustion product gas passes through a boiler in which heat transferred from the gas converts boiler feedwater into steam. a) Calculate the concentration of CO (ppm) in the stack gas.
Determine the molarity of Fe+3 ions and SO4-2 ions in a solution prepared by dissolving 48.05g of Fe2(SO4)3 in enough water to make 800.0mL of solution.
The freezing point of t-butanol is 25.50°C and Kf is 9.1°C·kg/mol. Usually t-butanol absorbs water on exposure to air. If the freezing point of a 12.0 g sample of t-butanol is 24.59°C, how many grams of water are present in the sample?
Calculate the final temperature of 37 mL of ethanol initially at 11 degrees C upon absorption of 624 J of heat. (density of ethanol =0.789 g/mL).
When the following equation is balanced using the smallest possible integers, what is the exponent of N2O in the reaction quotient expression?
Lithium fluoride(LiF) exhibits predominantly ionic bonding. THe Li+ and F- ions have elctron structures that are identical
A reaction mixture initially contains a Br2 partial pressure of 755 torr and a Cl2 partial pressure of 725 torr at 150 K. Calculate the equilibrium partial pressure of BrCl.
What is the pH of a buffer prepared by adding 0.809mol of the weak acid HA to 0.305mol of NaA in 2.00L of solution? the dissociation constant Ka of HA is 5.66x10^-7
How many grams of NaOH are needed to prepare 250 g of 1.00% NaOH solution in water?
Radio station KLBJ broadcasts at a frequency of 93.7 × 106 s-1. Determine the length of the waves that corresponds to this frequency.
why are we given a known and unknown hydrate. what is the point of having a known sample. why is it important. do scientists give is a more 'generic' name, if so, what would a scientist call the known
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