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You are a professional frontier re-enactor who specializes in making lead shot. To do this you put 2 kg of ice into 2 kg of water, both at 0 C, into an insulated bucket. To make the shot, you carefully drop 1 g droplets of molten lead which is exactly at the melting temperature of 327.5 C into the bucket of ice-water. The molten lead solidifies into perfect spheres and fall to the bottom of the bucket.
A) How much energy is required to cool a single droplet of molten lead all the way down to 0 C?
B) What is the maximum number of lead shot balls can you make without changing the ice-water temperature from 0C?
Water is about 15% denser than oil, What implications does this difference have on: An oil-based fire hazard such as burning oil slick, and cleaning up an oil spill.
If a student determined that the circumference of a balloon filled by the boiling point of liquid nitrogen was 45 cm, what volume of nitrogen gas has been generated?
At what pH will an aqueous solution of 0.210 M Mn2+ begin to precipitate as Mn(OH)2 at 25 °C? The Ksp for Mn(OH)2 is 1.9 x 10-13
A fossil fuel containing 84% C, 15% H and 1%S is burned with 20% excess air in a boiler. The stack gases are at 150 C. a) What is the concentration (ppm) of SO3 in the stack if equilibrium is established according to
Many metals react with oxygen gas to form the metal oxide. For example, calcium reacts in the following manner. 2 Ca(s) + O2(g) 2 CaO(s)
Calculate the unit-cell edge length of the densest diamond. Assuming the cell dimensions are fixed, how many C atoms are in the unit cell of the diamond with the lowest density
One brand of laundry bleach is an aqueous solution containing 4.00% sodium hypochlorite by mass.What is the molarity of this solution.
By Solving this problem student is able to understand how to calculate theoretical and percent yields in an experiment - determine theoretical and percent yields for this experiment.
what is the total energy in kj needed to raise 20 g of ch4o methanol from - 120 degc to 100 degc? show your work.change
calculate the moles of hydrogen and the pressure in each flask where the volume is negligible. Each flask is originally 275K with .455 mols of hydrogen gas and .7atm of pressure. Then one flask is heated to 500K while the other remains at 275K
if 18.4 ml of 0.800 mrm hcl solution are needed to neutralize 5.00 rm ml of a household ammonia solution what is the
strip of magnesium reacts in 3.0 mL of 5.0 M HCl over a given period of time. Evaluate the mol mg/mol HCl ratio for the reaction.
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