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Is the mechanical energy of an object in free-fall conserved? Explain. Persons A and B do the same job, but B takes longer. Who does the greater amount of work? Who is more "powerful"?
A 182-g sample of gold at some temperature is added to 22.1 g of water. The intitial water temperature is 25.0 degrees C, and the final temperature is 27.5 degrees C. If the specific heat capacity of gold is 0.128J/g*K what was the initial tempera..
their molecules or ions are in close contact and do not move. a change of state or phase transition is a change of a
Which condition characterizes the stoichiometric point of any acid/base titration? a) equivalent molar amounts of acid and base have reacted. b) The pH is exactly 7.0 c) The indicator changes from pink to colorless
Consider the reaction with the rate law, Rate = k[BrO3-][Br-][H+]2 By what factor does the rate change if the concentration of BrO3- is tripled and that of Br- is tripled
question a sample of oxygen has a volume of 4.50 liters at 300 k and 800.0 mmhg how many oxygen molecules does the
if 352 g of magnesium reacts with excess oxygen to produce 296 g of magnesium oxide what is the percent yield for the
If a buffer solution is 0.230 M in a weak acid (Ka = 3.8 × 10-5) and 0.410 M in its conjugate base, what is the pH
what is Boyle's law constant if a sealed rigid container with a volume of 650 mL has a pressure of 131.1 kPa
N2(g)+3F2(g)-->2NF3(g). If 1.7 g of nitrogen and an excess of fluorine is used in the reaction, what mass (g) of NF3 can be produced
How many photons are contained in a burst of yellow light (589 nm) from a sodium lamp that contains 609 kJ of energy
bone was dissolved in hydrochloric acid giving 45.0 ml of solution containing calcium chloride cacl2. to precipitate
The BF3 molecule has one A'1, one A"2 and tow E' vibrations. Does this representation account for all of the normal mode fundamental vibrations for this molecule
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