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What is the freezing point of a solution prepared by dissolving 11.3 g of Ca(NO3)2 in 115 g of water? (The molal freezing point depression constant of water is 1.86 degreesC/m) A) -3.34 C B) -1.11 C C) 3.34 C D) 1.11 C E) 0.00 C
A backpacker wants to carry enough fuel to heat 2.9 kg of water from 27 degrees C to 100.0 degrees C. If the fuel he carries produces 36 kJ of heat per gram when it burns, how much fuel should he carry? (For the sake of simplicity, assume that the..
Sketch a molecule of Pbr3Cl2 in which the chlorines are in axial position position. Sketch another molecules of Pbr3Cl2 in which the chlorines are equatorials positions.
What is the molecular formula for the compound containing 30.4% nitrogen and 69.6% oxygen by mass and having a molar mass of 92.0 g?
Find the concentration of Ca2+ and IO-3 in a saturated Ca(IO3)2 solution prepared by adding Ca(IO3)2 to a 0.015 M solution of KIO3
Discuss in detail, one way in which atomic nuclear decay takes place. What is the significance of atomic nuclear decay? Analyze the societal implications of using this process.
What is the system? What is the surrounding? In what direction does the heat flow? Is the process endothermic or exothermic?
A certain pesticide is fatal to fish fingerlings at a level of 0.5 parts per million in water. A leaking metal can containing 10.0 kg of the pesticide was dumped into a stream with a flow of 10.0 Liters per second moving at 0.7 km/hr.
Classify each reaction and give the name of all the chemical formula involved for each number
The plasma (HCO3-) of an individual living at a high elevation is 18.5 meq/L. If this concentration of bicarbonate fully compensates the decrease
What mass of CCl2F2 substance must evaporate in order to freeze 200 of water initially at 15 degrees celsius? (The heat of fusion of water is 334 J/g the specific heat of water is 4.18 J/gK .)
Assume that liquid water forms item 5. Write a formula equation for the reaction that shows the physical states of all compounds?
How much heat is evolved when 1259 g of water condenses to a liquid at 100°C? ΔHcond = -40.7 kJ/mol.
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