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A graduated cylinder is filled to the 40.00-mL mark with a mineral oil. The masses of the cylinder before and after the addition of the mineral oil are 124.966g and 159.446g, respectively. In a separate experiment, a metal ball bearing of mass 18.748g is placed in the cylinder and the cylinder is again filled to the 40.00-mL mark with the mineral oil. The combined mass of the ball bearing and mineral oil is 50.952g. Calculate the density and radius of the ball bearing. (Volume of sphere of radius r is 4/3pir3)
This sample is first heated to 100.0 degrees C, then added to a coffee cup calorimeter containing 35.0 g of water at 20.8 degrees C. The highest temperature observed is 31.0 degrees Celcius. a) Calculate the specific Heat of the lead
A glass of milk has a volume of 100ml. if the milk has a mass of 103g, what is the density of milk?
a sample of nitrogen gas is collected over water at a tempature of 23.0 c. what is the pressure of the nitrogen gas if atmospheric pressure is 785 mm hg
When 0.455g of Thyroxine is dissolved in 10.0g of benzene, the freezing point of the solution is depressed by 0.3000C. What is the molar mass of Thyroxine?
A quantity of ice at 0°C is added to 66.4 g of water in a glass at 55°C. After the ice melted, the temperature of the water in the glass was 15°C. How much ice was added? The heat of fusion of water is 6.01 kJ/mol and the specific heat is 4.18 J/(..
If the Ksp of Fe(OH)2 is 7.9 × 10-16, what is the maximum [Fe2+] that can coexist with these solutes in the solution?
Classify each of the following processes as spontaneous or nonspontaneous. I. H2O(l) --> H2O(g) T=25 deg C, vessel open to atmosphere with 50% relative humidity
Rationalize this phenomenom based on what you know regarding cyclohexane derivatives and Sn2 reactions.
osmium has a density of 22.6 g/cm3. what volume (in mL) would be occupied by a 21.8 g sample of osmium?
Assume that a particular reaction evolves 231 of heat and that 20 of work is gained by the system. What are the values of delta E and delta H for both the system and the surroundings?
Calculate the amount of heat transferred when 7.10 g of Mg(s) reacts at constant pressure with excess oxygen. How many grams of MgO are produced during a run of this reaction which experiences an energy change of - 234 kJ
A 180 kiln is used for vitrifying ceramics. It is currently operating at 1025 , and the pressure is 1.100 . How many moles of air molecules are within the confines of the kiln.
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