moles = gram/molar mass
calculate moles C4H10.
molality = moles/kg solvent.
delta T = Kf*m
calculate delta T and from there freezing point.
Abrasion occurs due to _____.(1 point) plants and animals friction seasonal temperature changes daily temperature changes Which describes a characteristic of water that is responsible for frost wedging?(1 point) Water expands as it freezes. Water condenses
2.9 The standard enthalpy of formation of the metallocene bis(benzene)chromium was measured in a calorimeter. It was found for the reaction Cr(C6H6)2(s) → Cr(s) + 2 C6H6(g) that . Find the corresponding reaction enthalpy and estimate the standard
A meteorologist announces that yesterday’s high temperature was within 4° Celsius of 18° Celsius all across the country. Write an inequality that involves an absolute value to represent yesterday’s high temperature. Solve the inequality and explain
when pure sodium hydroxide is dissolved in water , heat is evolved in a laboratory experiment measure a molar heat of solution of sodium hydroxide the following procedure was followed. to a calorimeter containing 300g of water at 20.0 C and 10.65g of NaOH
At a certain temperature, the pH of a neutral solution is 7.77. What is the value of Kw at that temperature?
A solution contains a mixture of pentane and hexane at room temperature. The solution has a vapor pressure of 241 torr. Pure pentane and hexane have vapor pressures of 425 torr and 151 torr, respectively, at room temperature. What is the mole fraction of
How many grams of ethanol C2H5OH(1),must be added to 500.0 g of water to make a solution that freezes at0.00 F? The molal freezing point depression constant water is 1.86 C.kg/mole
Which describes a characteristic of water that is responsible for frost wedging? A. Water contracts as it freezes. B. Water expands as it freezes C. Water evaporates as it is heated. D. Water condenses as it is heated
Calculate ΔSfus and ΔSvap for HF. Determine the entropy change when 7.60 mol of HF(l) freezes at atmospheric pressure. I already calculated ΔSfus as 24.103 J/k*mol and ΔSvap as 86.07 J/K*mol....These are correct (I checked them already). I need help
If 50.0 g of benzene, C6H6, at 25.0 °C absorbs 2.71 kJ of energy in the form of heat, what is the final temperature of the benzene? The specific heat capacity of benzene is 1.72 J/g ⋅K.
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